I haven't gotten around to making the rig for the vibratory tumbler, so i can't speak on it's results yet.
I found with my 110 mesh (approx 150 micron) silk screen that I get just a bit of plant matter in the dry sift, for me it's no biggie. Personally myself I am not brave enough to try the hash as I have a low tolerance lol. Wife likes to put it on her bowls though and says it adds effect and flavor.
I break up my flower/trim by hand (just a good squeeze of the trim to make smaller chunks) and pull the bud apart into small chunks. I have thought about using a coffee grinder to rough process flower into pre-ground chunks, but the key to the whole process seems to be how cold you keep it. I don't have a large enough freezer to run my apparatus inside the freezer so I imagine my results are a little more limited than yours.