Nice guide!
Here's something that tricked me the first time making these, the default size ratios when using them in holograms, and I think it also is how a lot of the default hologram avatars are constructed.
Here's 2 holos that point to the same file but with one small difference:
The bird on the left is
/birdmonk2s*3v*.mov
while the bird on the right is
/birdmonk3v*2s*.mov
Order matters!