If I'm not mistaken, the 1000 yr period was said to be the period of time it would take for new arrivals to decide if they will follow an STO or STS path, not the transition per se.
Also, note that 4D is said to entail "variable physicality", but I doubt that means immediately, or even in the short term. I think any move to 4D for 3D humans will involve continuing to be 3D for quite some time, albeit with a bit more awareness and "abilities" for some. For others, it seems it'll be 3D business as usual, although in a slightly changed environment.
As for the "level playing field", I think that means, at least in part, that the 4D beings that exert influence over us in 3D will be more obvious, and therefore less able to operate covertly as they do now.
This is from the Ra material is very illustrative of the matter.
Session 63 July 18, 1981
QUESTIONER: Third-density entities from planet Earth who have been here for a number of incarnations are incarnated in third density on this plane at this time and will graduate into three divisions: on the one hand the positive polarity, which will remain on this planet to experience fourth density;
on the other hand, the harvestable negative polarity, which will go to another planet;
finally, the remaining unharvestable third-density, which will go to another third-density planet. In addition to these entities, I suppose we also have some already harvestable entities from other third-density planets who have come here and incarnated in third-density form to transition with this planet to fourth-density. density, in addition to the Wanderers, is that correct?
RA: I am Ra. It's correct, except for one small point.
The positively oriented entities suitable for harvest will remain under this planetary influence, but not on this plane.
QUESTIONER: I think you said there are about sixty million Farstriders at present, do I remember correctly?
RA: I am Ra. That's right, approximately, because the figure is somewhat lower.
QUESTIONER: Does that number include the harvestable entities that come to this planet for the fourth-density experience?
RA: I am Ra. No.
QUESTIONER: Approximately how many of those who have come here from other planets are ready for the third-density harvest and to experience fourth-density?
RA: I am Ra. We can say that it is a recent phenomenon, and that the figure still does not exceed 35,000 entities.
QUESTIONER: These entities now incarnate in a third-density vibratory body. I'm trying to understand how that transition from third to fourth density occurs. I am going to take as an example one of these entities that we are talking about, which now occupies a third-density body. Will that entity age and its third-density physical body have to die and reincarnate into a fourth-density body to make the transition?
RA: I am Ra. Those entities are the ones that are incarnating with what you might call a "dual activation body." It should be noted that those who bring these fourth-density entities into the world feel during their gestation a great bond of union with spiritual energies and with their use, so to speak. This is due to the need to manifest the dual body.
This transitory body will be able to appreciate the vibrational complexes of fourth density as its influence increases, without the consequent cessation of the third density body. If a third-density entity were fully aware of fourth-density on an electrical level, third-density electrical fields would fail due to the resulting incompatibility.
To answer your question about death, these entities will die according to the needs of third density.
QUESTIONER: So you are saying that for one of the dual activation body entities to transition from third to fourth density, the transition will require the third density body to go through the process we call death, is this correct?
RA: I am Ra. The combination of third-density and fourth-density bodies die as necessary from the distortions of the third-density mind/body/spirit complex.
We can answer the central point of the question by noting that the purpose of such combined activation of the mind/body/spirit complex is for such entities to be aware, to some degree, of fourth-density understandings that third-density is unable to recall. due to the forgetting process. Thus, for a service-oriented entity, the fourth-density experience may begin with the added inclination to reside in a disturbed third-density environment in which to offer one's love and compassion.
QUESTIONER: Would the purpose of transitioning to Earth prior to full conversion then be to gain more experience prior to the harvest process?
RA: I am Ra. So is. These entities are not Wanderers, as this planetary sphere is their fourth-density home planet. However, the experience of this service is only obtained by third-density harvested entities that have demonstrated a great orientation towards service to others. It is a privilege to be able to obtain an incarnation so soon, since in this harvest time there is an abundance of experimental catalyst for service to others.
QUESTIONER: There are many children at this time who have shown the ability to bend metal by mental force, which is a fourth-density phenomenon. Are most of these children the type of entities we're talking about?
RA: I am Ra. So is.
QUESTIONER: The reason they can, and the fifth-density Wanderers here can't, is that they have their fourth-density body activated?
RA: I am Ra. So is. Wanderers are activated in third density in mind/body/spirit and are subject to the forgetting process, which can only be overcome with disciplined meditation and work.
QUESTIONER: I suppose the explanation for this is, first of all, that the entities suitable for third-density harvest have arrived here very recently and late enough not to affect the polarization through their teachings. You are not infringing the first distortion, for you are now a child, and you will not be old enough to really impact any polarization until very late in the transition. However, the Wanderers among us are more mature and have a greater ability to influence polarization.
They must do so based on their ability to penetrate the forgetting process and thus remain in the first distortion.
RA: I am Ra. Exactly.
QUESTIONER: However, it seems to me that some of the third-density entities suitable for harvesting are relatively old, as I know of some who can bend metal and who are over 50 years old, and others over 30. Are there entities that they can bend metals for any reason other than having a dual activation body?
RA: I am Ra. So is. Any entity that, either accidentally or by careful planning, penetrates the doorway to intelligent energy can use the form-creating powers of this energy.
QUESTIONER: As this transition into fourth-density activation continues, in order to inhabit this fourth-density sphere it will be necessary for all third-density physical bodies to go through the process we know of as death. Is this correct?
RA: I am Ra. So is.
QUESTIONER: Are there any inhabitants of this fourth-density sphere at this time who have already gone through this process? Is it being inhabited?
RA: I am Ra. It is correct, although only very recently.
QUESTIONER: I assume then that this population comes from other planets, as the harvest has not yet occurred on ours. They must be planets where the harvest has already taken place, right?
RA: I am Ra. So is.
QUESTIONER: So these entities are visible to us?
Could I see one of them; would they walk on our surface?
RA: I am Ra. We have already discussed it. Those entities occupy dual bodies at this time.
QUESTIONER: Sorry to be so clumsy, but this particular concept is very difficult for me to understand. I'm afraid I'll have to ask some basic questions to fully understand it, and I don't think I'll ever fully understand it, or even enough.
Thus, as the fourth-density sphere is activated, heat energy is generated. I assume that this heat energy is generated only in the third-density sphere, is that correct?
RA: I am Ra. Exactly. The distortions of experience of each dimension are different.
QUESTIONER: In that case, at some point in the future the fourth-density sphere will be fully activated. What is the difference between the complete and partial activation of this sphere?
RA: I am Ra. At this moment, the cosmic influences are conducive to the formation of basic particles of true green color and, therefore, to the formation of material of this nature. However, there is a mixture of the yellow and green ray environments at this time which requires the birthing of transient energy distortions of the mind/body/spirit complex. When the full activation of the true green love density occurs, the planetary sphere will be solid and habitable as such, and the birth that is in progress will have been transformed by the process of time into, shall we say, the appropriate type of vehicle. to fully appreciate the fourth-density planetary environment. At the present confluence, the green ray environment exists to a much greater extent in time/space than in space/time.
QUESTIONER: Can you describe the difference you mention regarding time/space and space/time?
RA: I am Ra. For your understanding, we will use the working definition of interior planes. There is great subtlety to this vibratory complex of sound, but by itself it may satisfy your present need.
QUESTIONER: I am going to make a statement so you can correct me if necessary. What happens is that while our planet is included in the spiral movement of the totality of the great galaxy and our planetary system spirals to its new position, the vibrations of fourth density are more and more accentuated. These atomic nucleus vibrations begin to create, with increasing intensity, the fourth-density sphere and the fourth-density body complexes that must inhabit it, is this correct?
RA: I am Ra. It is partly correct.
The concept of the creation of the body complexes from the density of the green ray must be corrected. That creation will be gradual and will begin with your own type of third-density physical vehicle; then, through sexual reproduction and evolutionary processes, it will give rise to the fourth-density body complex.
QUESTIONER: So these entities of which we have spoken,
the harvestable third-density entities that have been transferred here, are the ones that through sexual reproduction will create the appropriate fourth-density complexes?
RA: I am Ra. The influx of true green energy complexes will increasingly create the conditions whereby the atomic structure of the cells of the body complexes is of the density of love.
The mind/body/spirit complexes inhabiting those physical vessels will be, and to some extent are, the entities you have referenced and, as the harvest is complete, also the entities harvested from this planetary influence.