I believe the 1 lb weight difference is the whole plane, not simply the wing. If you look at BTE website, he says:

"6) Final Weight. The V60 typically weighs about a pound less than the FS60. I think this is due to the additional structure in the FS wing (unneccessary) and the careful wood selection used at BTE."

Don't know if this is a stretch or not.

I can only say I wish Bruce would build a few more kits!

I'd like to order one!