"Since I started making whitewood bows narrower and deeper the set does not seem to be much of an issue."
I guess my experiences have been the opposite, at least with the inner limbs. I get less set when they're wider and thinner (up to a point). When I make a bow outta oak or ash, and I keep the inner limbs 2" + they tend to take less set than if I make em 1.5" or less. Of course that's with a semi pyramid design etc...
Gabe