RE: Barn door vs. strip ailerons
How much dihedral?
Usually we cut the dihedral in half for ailerons, both strip and barn door.
Strips do seem more responsive.
On my Dynaflite P-51, the kit strip ailerons were too responsive, making the plane very twitchy.
When I changed to barn-doors (scale sized) the response was much more acceptable, but still active.