Plan B
Hey Ellis,
I had a set of those that came with the RV8A partially built kit I bought. I didn't like the 'old' shape, so I modified them to suit. It was pretty easy to do. I shorted and straightened the wingtips by trimming the inboard edge, angled to make the tip equal width front to back (actually, I also cut quite a bit off front to back to shorten the tips overall, 9 inches per side). Then I trimmed the trailing edge to match the wing. Then I clamped the trailing edge and epoxied it shut (taped it closed and poured epoxy in with the tip standing up. I had to do a little filling on the front to get the angle to match the front of the wing. It sounds like a lot, but really only took a couple of hours. Doing this had two positive effects, first the tips lost quite a bit of weight, and it had a great roll rate.
Lance