I had one, and I only made two mods:

1. Installed an OS .46LA
2. Installed Dual Aileron servos out in the wings

I didn't remove any dihedral, but I did up the control surface deflection as much as the stock bevels would allow. This is a great airplane, and you will be thoroughly impressed with its flying characteristics. It lands at a crawl, but will have plenty of power for fun flying.

Good luck!

-Wayne