RPi - Controller Plate

This is the Current Design for my 3D Movement System Controller

For the Following Devices....
3D Printers
Laser Cutters
CNC Machines
Peachy Printer ?

• 6 Stepper Controllers.
• 2 High Voltage / High Current Ports [ 40V / 25 - 100 A ? ]
• Temp Input ?
• Mic Jack ?