Hi Elecrafters: I have the following MCUs in excess due to upgrades: 1- K2 MCU 2.02f 1- K2 MCU 2.02h 1- K2 MCU 2.03d 1- K2 IOC 1.02 1- K2 IOC 1.07 1- KAT100 MCU 1.03 1- KPA100 MCU 1.05 If anyone can use any of these, they are free for the asking, first-come-first-serve. Regards, Jim, K5JAZ