I am going to start bilding my stuff so I start on the road to collodian bliss. The max I will be shooting (until I win the lottery or sell the business) is 5x7 with my 8x10. I need the internal measurements for a sensitizing tank. Gathering from what I have found on the net for larger tanks I need 1/2 inch on either side and two inches above the plate. Will this account for liquid displacement(SP)? The local glass shop only has 1/4 inch red plexiglass and IMO that is way too thick. So, I will have to order thinner, but in order to draw the plans I need some measurements. Anyone willing to help out? P.S. Anybody intrested in a boat shop?