I wouldn't use the WD40 again, I used it as a last step in thought that it would seal it off, but really it just darkened the finish a bit, and smoothed the wood grain. I soaked it in a few coats of wd and polished it with steel wool; not really worth the effort in my opinion.Excellent job on your first two slingshots. I really LOVE the ergo walnut tho.
Since I'm in learning mode, I am very curious about your thoughts on the WD-40. In lieu of bees wax?