+1 you could very likely double the size of the wing, and 1/2 inch of dihedral wouldn't hurt either.
http://www.homebuiltairplanes.com/fo...cs-causes.html
a very small amount of washout would likely help lessen the tip stalling issues too.
Last edited by AMA 74894; 11-19-2013 at 08:44 AM.
Reason: added details