Imagine a 1" cube of O-1 with a 1/8" slot milled 9/16 deep through the
center of a face. I need to put a 1/16" radius on the two edges on one of
the sides. The last one of these I made took hours with itsy-bitsy
(technical term) files and emery paper. I have a "Round-over" end mill with
a 1/2" radius but I've never seen one that small. Do they exist? I DID
Google and looked at catalogs for all the usual mill suppliers. I could
make it in two parts but that would be a wash, time wise.