I've installed an OS 91 Four stroke in my new H9 Spitfire and I'm having a difficult time getting the battery and receiver back far enough to keep the plane from being nose heavy. The rec and batt need to go well back in the fuse beyond the wing opening. Anyone else have this experience?

I used a Saito 100 and had the same problem.

How did you resolve the issue?

Added about 3 oz. of strip lead under the horizontal (1.5 oz. on both sides.)