nice chamber mang, you dont need much.. i like your quick disconnect as well..
here is my chamber. as it is, it cost:
1/20th of a 12 dollar yoga mat roll = $0.60
1/2inch in acrylic lid = $7
pyrex dish = $10
gauge from deceased big ass vac it pro. happy i aint trying to vac 3 gallon + solvents anymore. ~ $20?
the yoga mat was just a quick idea, i went and picked up some 1/8th inch rubber gasket making material.. hope to make a few more of these. :]
so, approx cost = $37.60
forgot to mention, i got a quick disconnect as well.. i wrapped my barbed fitting with painters tape, i can slide my hose right on and off, enough seal to get me to 29.5 and lock it :]