That is a really good idea! I think I will incorporate that as well.
866 is giant. I may cut it down some too but I want the span....So I may have to go with it. The wings will be fully removable and I can make new ones if they are too big.
I recently built an RC biplane converted to CL but havent flown it yet. They had this really cool wing aligment tool. It is light ply laser cut out of the wing tip shape. Like a Caban strut but it went around both wings. You fully mount the bottom wing. Then you slide these lite ply cutouts on the end of each side of the bottom wing and the top wing goes in the top slot and then you mount the top wing. Straight alignment every time. The flaps are in there as well so they are aligned to each other straight from the get go. May not be exact on the flaps but it will get you close.