First let me qualify myself: I have no aeronautical training whatsoever. You will get out of this what you paid for it.

The affect depends on whether you are talking about strip ailerons, or the barn door type, and just how long the wing chord is. In either case the impact should be small. Not noticeable for most of us sport flyers. With strip ailerons, you would be decreasing the wing angle of attack by a small amount. Unless you have a very short chord, too small to make significant change. With barn door type ailerons, you would be building in a bit of washout in the wing (angle of attack greater at the root than at the tip). Not a bad thing at all. Plus, there will be a slight differential effect (more up than down). That too is good.

If it were my bird I would do it in a flash and never think twice about it.

Have fun with it!

Bedford