My only problem with this height gage is that while it might work fine with Marv's rotating tool post, it will not save time with the quick change type post, since rotating it over the cross slide each time to check it will cause position change on your tool holders, unless you can somehow get it back to the exact same point it was at before the rotation. On the other hand, setting it with the QCTP while aligned to the work piece will allow multiple removal and reinsertion cycles with the actual tool holder while maintaining accurate height and position.

Other than that, I liked your simple center finder so much I went ahead and made one for my lathe. Thanks, Marv !

Dan L