Have acquired a tp airframe and wings ready to be covered.. I seen a couple of biplane conversation for the TP one with a straight wing above each other and another with a sweep wing.. I would like to use the wing that is already made, my question is what size of wing do I build for lower wing or can I move the upper wing forward and how would this affect the weight and balance. I know there was some talk about sager wing and how they perform I have built 2 nieport a 12 and 11 before. love the bi wing so want t stay with it.. Or any other suggestion's Iam using a vw motor.