I use the bandsaw to cut the tenon”s width, leaving quite a bit of room in the mortise (about 1/2″) to allow for expansion. Recall the leg piece is almost 2″ wide crotch walnut!
A dado stack in the table saw dials in the tenon thickness to match the mortise. I first take off material from the very tip to ensure a snug fit, and then do the rest of the tenon.
Finally a little trimming with a chisel to make it easy to start the tenon into the mortise.