compression is literally at the base of the neck, It took me a LOT of time to understand this. The way I understood it was by doing the compression (holding the breath) the whole program like that (volume 3), with a very low volume, by the end of the routine I had certain feel of control at the base of the neck, and i could play a little with the volume (btw throat opened, support etc, at all times)
this (compression) is something your body WILL forget as many other things, so it´s definitely something you cant say: "oh i got it! now ill do it without the hour training"
with this im saying you have to train it a lot, this is why we have to study the program so things really get stuck the right way,
I think this will answer most of the questions
because now you know why the distortion and volume can be done differently, I think the problem with getting this part of the course, is because we don´t focus on the texture Ken is approaching every note, we just want to get the high notes