The FADAL 1400-4 Upgrade Kit (PCB-0280B) was a gateway to a new era of CNC machining at the time it came out. This comprehensive kit, tailored for Fadal controls, is a compilation of essential PCB boards designed to upgrade your machine's capabilities. It serves as the bridge for those looking to transition from 1400-1 OR -2 to the more advanced 1400-4 control system. https://itscnc.com/circuit-boards/pcb-0280b.html