RE: balancing issues with extra 260
Here's some "functional" weight on the nose, if you don't mind loosing the look of the spinner. [link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXL729&P=7]Heavy Hub[/link]
Determine proper size based on your engine. That get's the weight as far forward as possible. Maybe this helps?
-MA