Thanks Doug,

The "ingenuity" was a round about way to improve the accuracy in machining the collet. Next I am going to try a more direct method for fabricating the ER16 collet chuck on the Unimat. If this works better, I will then make a collet chuck for the ER20 series.

Good to hear from you and looking forward to seeing another on of your precision toolmaker tools.

Regards, Paul