Thanks,I'm going to look into that. I have a WEN DP, which is identical to the Jet, so I can probably get the one for the JET. Sounds like it would be a good idea to contact the manufacturer to be sure. Thinking about it, I suspect I'll want the chisel bits in 3/8ths and one half inch.
I recently bought the Rockler round mortise and tennon jig that uses the pre made tennons, but I'd like to be able to make through tennons as well.