I'll tell ya what Kyle the 1.80 Moki is the perfect engine for the H-9 cap NO BULL involved. I have been flying mine for almost two years and it hasn't come apart yet. Like hilleja said the plane comes out tail heavy and with the Moki and the battery up on the tank it balanced spot on. I had my cap with the moki first so I planned for the need for nose weight on my second cap with the O.S. 1.60 on it, the throttle servo is mounted on the tank side of the fire wall and the battery is up on the tank also and I moved the servo for the pull=pull forward in the servo tray that cut down on the amount of weight I had to add up front. I hate adding dead weight to a plane and if I had it to do again I'd just buy another moki. Tear the plane apart that's a good one ha !!!