I just wanna add my stone to the small " I'm happy with my CSP750 that works fine and I don't see why people bash Dan " stack
At least 1 of my CSP750 works, the one I have rethreaded to 3/8, had it run on an open loop overnight, no leaks, no issues, noise reduced ( I guess the ball bearings had to run a bit until the pump is really quiet ).
I'll test the 2d one later
Otherwise, I'd like to thank Dan for his patience and support, and hope he'll get back soon from Iraq