Thanks guys. My main interest in Diafine is actually for 120 HP5+ and TX shot in my Mamiya 7. But if I'm going to have the developer around, I figured I might as well see how it works with all films I normally use, both 120 and 4x5.

I notice the box says not to use a stop bath. What about an acid fixer? Will it exhaust the fixer faster? I assume it's OK with a water rinse inbetween...