Altho your conversion came at the feet of Hosford, Bill, I see little to distinguish your horizontal application of the gauge and A-Mike's orientation and manipulation of his "Truth" gauge. As long as it works. PeteM has found another Achilles heel on David's: the inability to measure the walls of the chamber. The sliding indy holder also seems to be the idee fixe without which nothing is possible and with which less is possible without additional fixturing and special cases. I can see Dave riding the big tool carriage on the armature lathe at the power plant. Hey, Dave, I think direct-measuring at a single point with a caliper (the Manson design) is still the way to go. If I were "improving" the thing, I'd think about a more rigid external indy carrier arm( el-shaped casting, iron pipe, carbon fiber tube).
jack
