I have also made a wing with a sheeted LE. Then I applied capstrips to the tops of the spare from the sheeting back. Looked good. I didn't shorten the wing. If you like, you could inset a couple of T-nuts into the inside of the wingtip ribs so that later you could attach a couple of wingtip plates, just to experiment. That's what I'm going to do with my next 4*40

Just my $.02

Bob