I've often wondered how 2 channel R/C works without ailerons (obviously
well enough, right?)

I know a guy with a Yak-52, and I've noticed what looks like an almost
complete lack of dihedral on its wing. I suppose that has a lot to do
with its stability (or lack thereof?) The Chinese version (Nanchang)
has dihedral starting on approx the outer 1/3rd of its span IIRC.