Bob Weigel of Sound Doctorin' goes through a set of chimes probably built in the early 60's I'd guess. Pardon the sections where a battery ran out interrupting my speech etc. I thought of my dad as I cut the piece of plastic to repair that key. I totally eyeballed it and just sliced with the xacto knife rounded blade I was holding in part of it. It flanged out a hair at the very end but was otherwise within 2-5 mil the whole way on a two cut out of the middle of a piece of plastic! Hehe. I think Dad the master guestimator would be proud. I used to say 'Dad don't you think we should use a ruler for that??' thinking he was going to mess up and waste material. But he knew his trade well and seldom did. (less info)