Wayne, when I was in the cash register business, we reconditioned thousands of registers in the branch office, as opposed to "factory rebuilds", which were run back through the factory for major assembly replacement. Our reconditioning process consisted of disassembly, inspection, adjustment, and replacement of any parts that were not within specs., a refinish if necessary, with a 6 month warranty. No need to replace a 30 year old part, bearing, etc. that is still like new when inspected and tested.