[AdamHeard]

I'd add bearing bores to the block so both bearings sit in the same piece and they are 100% sure to be concentric and can't be tweaked/shifted due to tension, applied load, etc...

Also, if you have a manual mill in house and are willing to mill all these pieces, doing a more conventional west coast drive is trivially different. Our bearing blocks are pretty much what you drew in terms of time to make (possibly a bit simpler even).