While on the topic of OS 1.40 RXs, I am running one in my Partner. I have a dual plug head on mine, that I believe is an item that you can get from OS Japan though I know for a fact that it isn't a 3M head. I am running an Asano pipe and header with a Lockhart 3 blade and 20% Coolpower heli. Before I switched them out, I was running a YS 1.60DZ, and I wholeheartedly believe that this is a better motor, at least for my purposes. I didn't play with the YS too much, and while it was a good motor, the OS seems to have more power, although the airframe is lighter than it was with the DZ. The downlines are a little quicker than they were with the YS, but I think in the end, I really like the 2 stroke better. I have 2 OS 1.40FI's that I will be using next, I really would like to see how they compare. Another motor I would love to try would be the 3M Mintor 1.70.

Also, I would also be remiss if I didn't mention this since the thread is really about the Supreme, but that is a beautiful airplane you have there David.