Bigger..? See par. 2. The wing loading will be fine, I've already weighed up a built airframe with all the bits and added kludge factors and it still comes out a fair bit under 4lb.

I've considered adding 4" of span - the max for the spar stock length - but keeping the chord dimensions the same for a .60 version. The area increase is 15%, seems about right. I'd make a few simple mods to the structure. This would be a bit more user friendly I think.

The version I'm doing here is more of a cackling and wringing the hands in glee version, but we'll see how things work out.

MJD