MDS 2.18
I have a 2.18 that's going on a Sig 1/3 scale SpaceWalker, I put a Cline regulator on it yesterday and it runs fine upside down. I'm also going to use a 20x6 but haven't tached it with it yet. I still may change my mind and run it on its side, I just don't like engines upside down. I made a special oak mount for my AHP Mighty Engine stand to run it upside down.