Regarding the diagram on p. 203, you would need to include three speed ranges for the time-space and space-time regions, to see the dimensional structure, keeping within Larson's model. What we've been developing for RS2 is derived from what we believe Larson was actually trying to describe, without knowledge of imaginary operators and projective geometry:
Larson's "2 units of motion," speed and energy, that give rise to the 0-1-infinity diagrams are a complex quantity of real (speed) + imaginary (rotational energy).
Larson's speed ranges are a 3D form of rotation through a quaternion, as described in daniel's Part V paper: real (speed), imaginary (1-x energy), imaginary (2-x energy), imaginary (3-x energy), which brings you back to -1, inward "real" speed. There is also a 7D version that arises from the math that seems to apply to life units.
Now, when considering the effects one aspect of motion has upon the other, Larson says that only the "net" motion can be transmitted as a push or pull. Well, because he had a totally yang, linear approach, he missed the torsional component--spin is also transmitted across the boundary as a net, angular velocity. So what gets
transmitted between aspects is seen as a
complex quantity of speed (linear velocity) and rotation (angular velocity).
So when a quaternion rotation is present in one aspect, what is seen in the inverse aspect is a complex quantity--such as the electrical rotation in atoms--basically the "shadow" of that quaternion rotation is transmitted to the inverse aspect, giving rise to waveforms and wobbly spins, that conventional science ends up breaking down into components to describe, such as the dielectric and magnetic waves of a photon.
Regarding densities, frequencies and the like, those were my early attempts to reconcile the Ra material with Larson's theory, with some Urantia Book thrown in (such as the Ultimaton references). What we have found since is that vibration, in general, tends to be "squealing" when something gets out of whack, in an attempt to compensate for the discrepancies of motion. Look at music for an example. Sound is a vibration and it originates from instruments being tortured (particularly these days!) A bow scraping on a string, air passing a hole and crashing with itself... vibration arises from a disharmony (which I know is contrary to the New Age beliefs). Even in electronics, oscillators are made by misphased feedback.
As daniel put it, linear motion creates a volume in the sector you are observing, whereas rotational motion creates a structure--which is an "inverse volume," because the locations are in the reciprocal aspect.
I spoke a great deal with Carla on densities when she was writing the
Wanderer's Handbook. Densities are basically quantum levels of complexity in the Reciprocal System. Larson covers the first three in
Beyond Space and Time. (If you don't have BST, order soon from
http://rstheory.org as they will be out of print once this last case is sold--think I've got about 40 left.)
Anything beyond 3rd density is speculation at this point, because we do not have the foundation to comprehend those levels of existence, until we actually go and experience them. It is like G'kar trying to describe the First Ones on
Babylon 5 to Catherine, using an ant on a flower. (See:
https://www.youtube.com/watch?v=ZLZW8Deq8vE). So I prefer to stick with what we
have experienced, because with a good foundation, there are always "natural consequences" that can take us further down the Path.