John,

Should you get to a second prototype that you want to test with pyro instead of D-76 I would be happy to help. I use Bostich & Sullivan's Rollo Pyro on T Max 400, Ilford FP4 and HP5. As mentioned above I am presently doing two 7x17s at a time in combined 2560 & 2830 tanks. I have a new unused 3063 if you want to make a test 7x17 version that will do three sheets.

John Powers