The question of balance...

I originally set it up according to the instructions and it came out a bit nose heavy with the battery under the fuel tank. Not real bad, something like 1.5 oz of wieght in the rear. I had added a tray for the Rx under the cockpit area and when I moved the battery back there it came out fine. Funny thing was that it balanced perfectly the first day out, when I flew without the cowl. I had to rearrange things when I added the cowl.

Oh, and I'm still using the recommended CG.

Another thing I've noticed. The tendency to nose over is very much dictated by the CG. I fly off a dirt/gravel strip and the only nose over I've had was when it was nose heavy (I forgot to remove the glow starter, Doh...). With the CG where it belongs the attitude on the take off roll is very level. As the CG moves forward the nose starts to sink lower and lower and it will become very easy to nose over. The wheels are 2 7/8 diameter, so IMHO if you balance it correctly, you should have no problem flying off grass without turning the gear around. But at least it's easy to switch the gear back and forth.