Nice thread Matt, good info all around. Definitely one of the better "how to" thread on making bubble I have seen. Cool to see someone else using the drain method too. I built a similar set up for my 20 gallon bags about 4 years ago, and man what a difference it makes. One question though - why do you soak your material for 10-20 minutes before you agitate it? Is it to get it cold?
I don't think this was mentioned in this thread, but I always freeze my material first . I've found you tend to get much a much better extraction when you do this. The trichrome heads beak free much easier, allowing you to maximize your yield with a a much shorter mixing time. I've seen some people claim the freezing ruptures the trichromes, but after observing them with a microscope before and after being frozen I've found this to be total BS.
Also just my two cents: Having done many, many batches using both fresh, wet material, and dried material, from the same plants, I've found the fresh stuff always comes out better IMO. I'd agree with you that people that claim dried shake gives you "crap bubble" don't know what the hell they are talking about, since you can pull some amazing quality with dry shake, but the wet always comes out a little better IME.