i built this simple plane, which worked pretty well i put the reaction wheels on BOTH end of the craft, as well as added many control surfaces. worked like a charm. I think the problem is that people are not putting enough reaction wheels and not putting them in teh right places edit: oh also the lag problem was solved for me (credit to AncientAstronaut) go to settings.cfg set kerbin ocean min distance to 1, max subdivision to 1, worked wonders