Serious consideration needs to be made on how much of your CNC machine you’re willing to upgrade.  Specifically, your router mount may need to be upgraded prior to installing the spindle motor.  If you choose either our 0.8kw or 1.5kw spindle kits, then you likely already have a 65mm router mount as that’s the size of the Makita and Carbide3d palm routers.  If you have a 69mm mount for a Dewalt, collar inserts are available, however best option is to reach out to your CNC manufacturer for a properly sided mount.