Hi John,
I will keep the X3 as it is running well and as everybody knows we all need two CNC mills.
I have a mate that says two are good but three is better.
You certainly are a lateral thinker. For me I will keep the motor out in front where it can be serviced easily. Room is not an issue as I can make the enclosure any size at this stage and the covers I put over the X3 motors have provided good protection with flood coolant.
Keep the ideas coming.