OK, so taking all the comments into consideration, here's my thoughts on my next attempt...
1) Levers will be reduced to: 10" long and 1/2" wide at the fades, tapered to 1/4" at the tips, and be 5/8" thick at the fades tapered to 7/16" at the tip, with a tip overlay for the string groove.
2) hard lines will be removed, and instead the back will be a series of smooth curves.
3) Hickory backing over a belly wood yet to be determined - NO core lamination
4) bow will be 68" tip to tip
Something like this sketch...