I recently acquired some MT3 tooling from a guy who changed his MiniMill to R8. The kit contains a 5-piece set of endmill holders in the usual 3/16" to3/4" sizes. Their drawbar looked a bit smaller than the 12mm bar that shipped with my Grizzly MiniMill, so I had assumed the threading was 3/8-16. Closer inspection when I got the stuff home showed the threads to be 10x1.5mm. Neither Griz, LMS, McMaster, nor Enco appear to stock 10mm. Swell, I bought orphans. Can anyone point me to a vendor who supports 10mm?