tIANci - well i have the ASP FS30 in there and i heard that (shhhh) they copied the O.S. :-) the 26 is the same size. i had to cut out some of the wood from the mount but it fits just fine. i would have to admit that the 15 would be the perfect fit.

Mr. Mulligan - my avatar is the WM Cub with a O.S. FS30. great plane... but i think just right with the 30. the 26 may not be quite enough.