Screw it- water jet a fresh shim plate of the thickness you need to clean up that 'work of art' and run it. I'm guessing that by the time you need to worry about that bearing tape, you will have two willing, able, strapping lads that can do the job while you provide guidance from your chair drinking a beer! To make sure I'm reading it correctly, the sprockets appear to be a quarter inch to thick on the inside (toward carrier). Can't those be flipped around like other cats to promote even wear of the teeth? Or is the sprocket actually a half inch (overall) to thick?