"mlcorson" wrote: (clip) Also, found items seldom match up perfectly, all
complicated by the fact exact measurements are seldom known. How would I go
about this? (clip)
^^^^^^^^^^^^^^^
If you want to minimize your cost by using "found" components, I suggest you
look for pld motors, fans and the like--and incorporate them in the design
of your sculpture. Bearings have to fit, which usually will involve some
machining, which it seems you can't do.