[Cory]

I'm a little confused as to why your bearing blocks are only on the inside, and there isn't a second mating half on the outside? The entire point of making the bearing blocks is that they can slide in a pocket to tension your chain. Without that feature there's really no reason to have them.

Additionally, once you add the radii to those pockets on the face of the bearing blocks they'll be so small they probably won't even be worth machining.