thanks, i hav'nt yet converted the ATX so no test run yet, im also anxious to check the runout.

what are you looking to cut with the new design? will it be an ER collet?

much too early, but im looking to order a NTM 5060 & design a unit to hold an Arbour. i really want face milling capability, & ER collets dont seem to have that option.