RE: CLPR's choice of airfoil on the osmose.
I don't think lift is the issue as the aircraft has more than enough wing area, and it's not about less drag either in this case. Don't forget we're talking about F3A here, not a P-51 mustang. The speeds are low and constant speed flying is the game, the use of a laminar airfoil in this instance seems to be counterproductive.
Also having too much lift at the wrong time is as bad as having not enough.
But hey, what do I know.