The following was on the punch list to update:

• cut slot for pivot piece (cantilever) + add clamp
• add recess for linear bearing to bottom of cantilever
• add round piece to loading port of mandrel
• center hole for both mandrel location pieces
• single pivot for the mandrel (up and back?)
• provision more space on platform for bigger servo
• space servo arm/fork on aluminum rod so that the platform is horizontal when the drive in action with cutting head
• move mandrel coupler/motor onto the carriage housing physically (remove the motor mount)
• add four holes for the screws and recess for the motor nose
• move belt to be directly in line with the linear bearing

That has resulted in the following model (I used the Nema 17 motor model from the 3dWarehouse by pikachu):