RE: GP Skybolt Kit
Well, I have to disagree with just about everything Silversurfer said (no offence meant)
But my skybolt was originall flown with an older OS 90, and I had to put the battery behind the radio compartment to balance it.
Once I updated to the YS 91AC, I had to move the battery further back.
And once I added the smoke system, the second battery pack went midway back to the tail, but I never had to add nose weight to compensate for a heavy tail.
Also, I used all of the stock 2-56 hardware and never had a problem (And I really wring that sucker out).
Geeze, why would you be talking about keeping the tail light in one sentence, and then saying switch to heavy hardware in the next?
jucava, just build it according to the plans, go easy on the glue, and enjoy one helluva airplane.
PS, hard to say on that engine choice. I would prefer to use a 4-stroke, but the 91 2-stroke might be interesting. Of course, with the lighter 2-stroke, you MAY have to add noseweight, so I think I'd stay with the 4 stroke.