deskthority

This begs the question, does Unicomp manufacture their own springs? If yes, why not just order from them? If no, why not try to find out who they out-source to. Or perhaps the tolerances that Unicomp set are substandard to IBM's specs?

By you documenting all the steps being taken and all the trials and tribulations, I wonder what it was like back when IBM was designing this keyboard. I mean they were defining all the tolerances for each piece. You are trying to match their tolerances to the T but I always wondered how they arrived ...