I placed a piece of 1/16" balsa on and it was definitely not high enough so I started the job with a 3/32" strip which is now glued onto the back of the wing. It looks a lot better.

It looks just hairline high, so I will finish shaping the leading edge of the aileron and maybe lightly sand along the hinge line on the wing to ensure the hinge line won't be under the surface.

Thanks again.