I was gonna say seal the gaps, but they look pretty tight up to the wing. Shouldnt be too much of a problem. The ratio of aileron area to wing area may not be perfect. I have found this out on foamies a lot. If they dont have enough aileron area, they dont create a powerful enough airfoil to overcome the resistance of pushing the wing through the air. On this plane it shouldnt be too bad of a problem, just throwin out ideas.