After picking up the kids from school I spent some time finishing up the rear disc swap. I know this looks rough, but it is totally functional. This was also a "dry run" Idea and I may clean it up later. I followed the instructions as were posted in the earlier link. My only small modification/add to them was to tack weld the spacer washers (top of caliper bracket) because I could already see them falling out into the mud on the trail during a repair since they are sandwiched between the caliper and bracket. Now, rear shaft replacement is a 15-20 minute job tops, vs. an hour plus for original drum setups.