I'm rebuilding a model 1 and looking at the flaperons and considering building a new set. Mine are completely undamaged but I've heard some people express discontent about the roll rate on the early foxes, which is something I want to improve while I'm doing all this work.

I know that they went from flat bottomed on the 1-3 to symmetrical on the 4-6 And now on the 7 use a semi symmetrical airfoil, so I think I would go that route as well. As the title indicates I'd like to know the chord length of the current flaperon. I'm wondering if it got a little bigger in the current aircraft? My flaperons have an 8" chord length.