Ok I've got a Millrite MVN with a spindle that is ground to NS30 taper with I found out means National Standard. It came with a Universal NS30 Collet holder with ZZ collets which are very hard to come by and expensive. I have a NMBT30 tool holder I got from WONG FU and it fits well I measured it and it is not any different other than the drawbar will need a spacer because it is to long for a tool holder by about an 1/2" not a big deal. The questions I have is: 1. I found a NMTB30 Collet holder with ER32 Collet set I've never used collets but are ER32 good for milling? 2. What is the difference between an NT30 Tool holder and NMBT30 tool holder. I guess I'm missing something?