... The wood is rather brittle and has several cracks glued up, that and the weight of the 42" 7/8" straight barrel coupled with my inexperience made me leery of taking away more wood.
One odd trait I've noticed, doing multiple efforts at removing "enough" wood: there's a point at which the wood gets thin enough, the metal actually supports the wood, rather than wood supporting metal. The real trick is getting the wood you WANT removed, off, before you flat-out run outa wood in those areas (wrist-comb transition; forearm vertical tapers and transitions, etc).
At that point, ya gots to be pretty careful about installing and/or removing parts, too.
Obviously, at that point, you're also right on the cusp of the tipping point, where the wood won't hold together. But...