Ok ya same source, they are partners, in the sxrm the R stands for Rettinger and the M is for Masters, not sure is ron though, one of there boys rides for commander, just curious why you so worried about donor boats, sit downs are made to be dingus proof, I just got one for 400$ working with a new crank and cylinder knowing I'm gonna rebuild it anyway, for 400 I got electronics, pipe and guts, I'm going to be gutting a sick sick sick nasty sick limited 800 after world finals if you know anyone looking for good parts and engine