In an attempt to get this thread back a little more positive, maybe someone could explain the variations in the model 750.

I see there's a -F and a -P floating around out there. Any other types? Since these seem to be the engines from RAM that no one seems to complain about, I'm thinking of scouting out a pair to put on a big Lassek A-10 - the thrust level is a perfect match, as are the recent prices I've seen around here. Just need a guide thru the jargon. Anybody, anybody?

Thanks