There are lots of ways to find the center of a round piece of stock, but *most* of them are a bit of a kludge and involve a combo square and more than two hands. There are a few other "center finders" out there on the market, but this one is the easiest and most foolproof I have tried. You can get one from Rockler Woodworking here : J Square Center Finder
A Vintage Introduction to the Mellotron
The Mellotron is a tape sample playback keyboard from the 1960s that made an appearance on multiple Beatles albums, among others. Each key triggers a magneti...