Has anyone here used a Spin Indexer? There are quite a few parts on the PDB and ATC that could use a spin indexer for fixturing. I've been using 5C collet blocks in a vise, but a spin indexer would be a much faster way of re-orienting the part. My only quesiton is: How is the spin indexer precisely aligned to the machine axis? The ones I've seen don't appear to have and ground reference surfaces that could be used for alignment.

Regards,
Ray L.