There are various ways to cut dove tails but I have never heard of a particular jig. I made a stop for my hacksaw blade to use in removing most of the material in the slot, and ground a special chisel to lift the dovetail after filing it. You can buy sight base files from Brownells to cut the 60 degree dovetail by hand. If you have a milling machine, then you just use a dovetail cutter after using a straight mill. I guess there are lots of little jigs and special tools to do the job, but I never heard of just a dovetail jig. Did you hear of such a thing somewhere.?