So it went horribly.
I used some Tangie OG that was kinda frosty, chopped it in a blender, mixed it vigorously in the ice water, then started sending the liquid through the mesh.
The finest mesh was 25 micron, and that yielded some dope hash. Probably some of the best I've ever smoked. I'm still mad though, because from a qp I got 2.8g of hash. Not nearly enough for rosin. Not terribly sure where I fucked the process, but the byproducts of the extraction were all usable. After being dried back out, the weed was still smokeable and clearly had oodles of thc left. The water that had been through all sizes of mesh was still gold in color, so a buddy and I boiled the water down to a dank concoction and had a cup each. This decision resulted in my having to call in sick to work because I woke up zooted. It wasn't even that I didn't want to go, I just wasn't capable of the drive. Based on that, I'm thinking about boiling down the water completely and seeing what residue remains.
Definitely going bho next time.