I run an RC Airplane Club at the school where I teach and we finished and flew our PT40 that we built. I substantially reduced the amount of dihedral on the plane to about 2" total. The plane handles much better, especially in the wind. Young people catch on to RC very quickly and as well, we have been using Realflight G2 in the classroom too. Just waiting for the weather to warm up a bit to get back at it. If the student was an older person perhaps the extra stability might be useful, but in general, I believe the PT series use too much dihedral in the design.

Cheers!

Jollidude