I'm building one now, but the one-piece wing is "too much", so I'm building it as a two piece wing with a wing tube. This has taken a lot of "re-engineering" to put plywood doublers on the inboard ribs and beef up the spars. May add a little extra weight, but I think it's worth the mods.
The plane is ultra-light anyway, and I'm using an Enya 120 4 stroke for power. Wish I had the new Enya 150 in the same case - but "Que sera".
FYI>
Ray