I agree with another poster about the power supply being suspect, especially when you add another drive. It's really easy to convert older PC power supplies to power the 1200 and you'll have wattage to spare.
EDIT: I've worn out several keyboards. Commodore used several different keyboard suppliers. For me, individual keys would become intermittant and finally stop working all together. Upon dis-assembly, the rubber carbon pad on the bottom of the key wore down. I never found a way to patch this. Cleaning with isopropyl makes it worse, grin.
