I did 2 different runs of this.
First run was with Madagascar, Timewarp, and Atomic Haze. About an oz of each. The yield sucked, would have got twice as much value if I made BHO with it.
Second run was a QP of OG. Almost everything landed in the 73 and 45 bags. Made some good hash, but again the yield was horrible.
With that said, was my first time doing it. I may have overloaded the machine. It has certainly discouraged me from doing it again for now.
I think if I had used 1 oz of material, 1 bag of ice, and 1 gallon of distilled water (at a time) then it might have worked out to a higher yield.
I think it might be sensible to beat it up for less time (I did 15 mins), and even maybe manually (I used a washer). I freeze my material beforehand, and mix ice in the pyramid bag with the material. I didn't grind the buds though, as Panda said.. You're after trichromes, and grinding up your materials doesn't help you with that. Ideal starting material would be never dried, fresh to frozen, but I don't have access to that. So been using dry buds.
I'd be open to doing it again, but I could use some advice. Based on what I wrote here, does anyone have any suggestions to improve this process? Can anyone confirm any of my theories above? Is it ultimately just better to make cannibutter or bhos from bud than it is to make ice/bubble hash?