Dan Shaft encoders aren't much, but the accurately punched tape that won't crack seems to my little cynical brain to be the problem. I've wondered about taking the Cobolt unit and gutting it, using only the case and tape and encoder/sprocket and re-doing the microprocessor.
Wish I could just reprogram there processor since the speech is so good. Just like capitalists to spend more effort on the speech than on the programming. Seems to be a cobolt habit, there appliance timer is flakey too. Tom