Has this been done? Can in be done?

I have a HL Bonnie sport plane with strip ailerons that often comes in hotter than I'd like. I've gottem much better at slowing it down, but since I fly out in the country and use a road as the runway, I'd feel more comfortable being able to slow it down easier since the width of a road seems like a lot until you try to set a plane on it. Now if I had a big grassy field I wouldn't care a bit.

My idea was to attach a couple flaps to the inboard underside of the wing but I assume the length of the ailerons where the flaps are would then be pretty much ineffective on the downswing but act like an airbrake on the upswing.

Any ideas if this arrangment would cause any severe changes in control? I don't want any surprises leveling the wings with the ailerons on approach.

Tried flapperons. Don't like it.