Yes Charlie, but I said ALL airplanes, not just this one. Dihedral won't prevent a model rolling, I have a couple of R/O models, with dihedral, that roll really well. One of them is an overpowered Headmaster. Hence the idea to add rudder in the direction of roll. I think the OP has got the idea that this model is not ideal for what is being attempted, but he can continue to experiment with the disposable model until he has finished something that is more inclined to respond to aileron. Perhaps he could respond with the results of his experiments?
Evan, WB #12.