I had mine modified to use two servos and have spoilerons/flapperons. Was worried that I would need it to make landings safer/easier.

In actual fact, I never used them after the first few flights. The plane is quite stable (probably due to the fact its semi scale, and not full scale) and landings are a breeze, just tracks straight in, a little elevator, and a slight burst of power right before touchdown is all you need for a greaser.

Based on my experience, you should have enough aileron authority, as the plane was quite nimble. Its actually up to you based on your personal preference whether to modify it or not.

This plane looks amazing when doing an inverted low pass