Some updates on the JWG. First, I got a new fan from Grainger. It's a blower, rated at 559 free CFM. It derates to 330 cfm at .8" wc. I'm restricting it off most the way and achieving combustion temps around 1300. I'm still getting secondary air leaking into the firebox... (As the refractory expands, it pushes the walls of the firebox out, then when it cools, the walls don't come back. I've tried all sorts of sealants and none of them last..... I'm going to line the sides of the firebox with firebrick to cover this up and seal it off..) I had to insulate the top of the stove as it was throwing off so much radiant heat that it was overheating the motor on my draft blower. The angle iron girdles helped strenghten the stove somewhat.... I have my pressure relief set at 8-10 psi and my operating pressure runs about 6 most the time..... I pressure tested the stove to 10 psi and while the exchanger cover was bowed noticeably, it wasn't starting to creak or make noises.... That's about all for now.