I had my Moki mounted inverted to avoid chopping a big hole in the side of that pretty cowl. I also had the wrap arpund pitts muffler, an aluminum Truturn spinner, beam mounts, onboard glow driver and Perry Pump. When I put the ZDZ 50 on the plane I used a carbon fiber spinner that saved some weight but to my surprise when I balanced the plane with the new ZDZ on it, the plane was actually tail heavy. I had to move the ignition battery to get it to balance where it was with the Moki. The ZDZ has a lot more power and carries a lot less weight in fuel.