Thanks for all of the advice and I read everything. What I did was to order a Mitutoyo 115-313 tubing mike. It has a ball ended rod type anvil that can fit into all sorts of holes, nooks, and crannies. This is something I need often so the $135 purchase price is worth it. The Starrett mics needed to be special ordered with the .0001 vernier so that made the Mitutoyo clamp look good. The word "clamp" comes from my past. One of my kids was doing an art project and they clamped everything together with my micrometers while the glue dried.