Sorry for the delay but I just located the post.
I looked at that wing and it reminded me of the commercial planes that have a leading edge flap that drops down.
Being their built into the wing tips I can only assume they produce more drag and allow for better turns.
Seems a bit big for a .46 engine.
I was thinking of getting that and modify the wing and reduce the dihedral just a bit
I think it's a bit over priced since the other BIG trainer is about $100.00 less.
I'll have to look into that.
Thanks for responding/
Vegas/