Hi, I purchased a workbee with the GDZ-65-1.5 air cooled spindle and wanting to know the correct version of ER11 collet to purchase? Also, the nut holding the collet is a ER11-M14x0.75 and the collet is somehow locked into the nut. How do you usually remove the collet. I have not tried to force it, does it clip in somehow? Thanks