Rob: Give it some serious thought. Wrong kind of wing for sustained inverted, Arm not long enough for the foreward stick required, in the verticle, "Hammerhead", the balls don't know which way to select the oil source. so pressure and surging prop likely. As Randy says All that weight not good... COST.. I have it on my RV4 waste of time and money. Opted out on my RV3B Good Luck RB