How's the performance on these sapling bows compared to a stave of similar design? I'm wondering if the crowned back helps with reduced weight
Ben, the TBB says they do, or can, or something. The line, I think from the chapter "Bow Woods" in Vol 3 or 4 is:"Longbows made from small diameter staves seem to perform best." If a bow can TAKE a crowned back (Iand osage, hickory, elm and some other CAN) the belly will be fine.
However, I think they are great, but it's not so much that it'll revolutionize archery or anything, maybe not even so much as that you'd notice. A bow like Aksel made is a good choice for a small stave like that, a good solid performer. Likewise, a less crowned flatbow with skinny tips is a good choice for a slightly larger diameter elm, and a bendy-handle/parallel-sided middle bow is a good choice for a shorter, small diameter stave.
I love the stuff. And essentially the same goes for ash and other white woods. They do fine with toasted bellies,too.