Here is the completed aileron horn.

Need to add cap strips to aileron.
I have yet to do my wing tips. From pictures I have seen they are not shaped as they are flat at end of wing. There may be a little rounding of the leading edge at the wing tip.
I actually plan to add wing tips so as to protect the aileron for the ocassional cartwheel landing I do.

Also some protection for transporting as well.
Alistair