Now that's an idea!
I think there must be some antiroatation washers that would work and if not I like the idea of just having one machined.
As it stands now I'm looking for a frame whose cable routing goes along the bottom of the chain stay. I figure since I need a different frame (size wise) anyway I should go with one that will aid this build.
so far I've found trek, bridgestone, and nishiki all have models with the below the chain stay cable routing.