Profiles look sweet. I dig the birch bark as well. Here's a few notes from TBB 1 on hand shock...
"the outer limbs of bows with severe hand shock can be retillered, slightly "whipping" their ends, then shortened sufficiently to maintain draw weight"
"high-strung bows, full-draw short bows, and deflex-recurve bows have less hand shock"
"Bows with stiff, or only slightly bending mid-sections (not just handle sections) tend to release with less hand shock"
"Both working-grip and stiff-grip bows have unpleasant hand shock if tillered too round in the handle"
Don't know if any of that helps, but it's a beauty of a bow either way.