RE: Mini Telemaster Mods
1) Build the wing flat, you will have more than enough stability and it will fly better with less rudder roll coupling.
2) When setting up the throws, use a LOT of differential on the ailerons. That is, have more up travel than down. 2:1 is a not unreasonable starting point, maybe even 3:1. This is because that big high lift airfoil will give you a lot of adverse yaw and that is a serious nuisance at best and a plane killer at worst.
How big is the mini Telemaster? Will it carry the weight OK?
Mark