I too built my own mill. Knurled my own rollers, mounted them on sealed ball bearings and made them adjustable from .035" to over .125". I built an aluminum sheet hopper that will hold 50 lbs of grain (a bit overkill). Mounted the whole thing on a 1" MDF board and I sit it on one of those...
I like the "Bowl hood" idea but the system I built would be a bit big for the 30 quart bowl. Considering I am a bit of a junk yard rat, (brew table burners out of old propane water heaters and such) and I love the idea of re-purposing stuff, I think I may have a solution that will better cover...