ORIGINAL: f3a05
Do you mean snap roll when you say spin roll? (or another way is to call it a flick roll---same thing as a snap roll)
If you do, then plan form and wing loading are more important than the section, but, for what it's worth 64012 at the root and down to 64009 at the tip works well in my hands at least.
I´m sorry but I don´t understand few words, because my english isn´t good enough:
plan form , section Can somebody explain me these words?