re: Chuck Box

Thanks, Petey.
Hi Eric I have made many go/ no-go gages for my 4 jaw wood chucks  to quickly determine the max and min for the mortise and tenon made to fit the chuck. Here is one of mine from Lumberjocks: I use it all the time!
https://www.lumberjocks.com/threads/gauges-in-the-shop.331525/