Rejected Because: Since I started my own Aluminum Foundry I just decided to not make any parts out of MDF...

Here's a look at the motor mount that I designed and cut with machine #1 :) You can see the six holes that will bolt the motor mount to the t-slot aluminum extrusion. Since I used the first homemade CNC machine to manufacture these - they are perfect! These particular mounts will hang off the bottom of the Y Axis - I will make two more of these (I think) for the X and Z axis. On the other side of the motor mount I will need two bearing mounts that hold the lead screw bearings.

Motor Mount Bearing Mounts Bearing Mount - Bearing Installed