i have an mds 78 on a super stick,i havent had any dead sticks with it,i have had problems with the carburetor loading up when i am coming in for touch and goes no mater how good the carburetor is adjusted it seems to change slightly when in the air,it takes a few seconds before it clears and then gets right back up to rpm.this engine to me isn't the best choice.i finally put an OS 60fx on it that engine seems to have much more power than the mds78 and no problems.i think the best choice engines to put on a trainer would be a thunder tiger 46pro,or like was said here one of the OS la series engines.