Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
Why are you guys interested in holding 6-7 screens in a dip tank? if it takes 2-3 minutes(heck maybe 4-5 for pure diazo emulsion) in the dip tank, why would there be a need for any more than 2-3?
Our screens almost always spend more than a few minutes in the tank. My guy (that we are replacing this week) moves about as fast as a sloth. He's one of the slowest moving land mammals on earth right now and I thought about calling Guinness Book and getting them out here to check him out. Our's holds 5 23x31 screens and we always have it full it seems even though we don't need it to be. The longer the screens are in there, up to a point, the easier they are to clean. I haven't found the chemical to be too hard on the mesh if they are left in the tank for 15-30 minutes. We use Easiway Supra, great stuff.