The vise backer board has a stub tenon on each end. The bottom one needs to be made first so the backer board will set on the long stretcher for marking the top tenon and angle of the leg.
One of the nice things about Poplar is it is easy to split and splitting the short wide tenon is a lot easier than sawing.
Next is installing the screw. To install the screw I need both a 2 5/8" and a 1 1/4" Forstner bit, the 1 1/4" is no problem. The 2 5/8" I had to order. It should be here tomorrow but until it arrives I'm dead in the water.
It may be a good thing, a nap and pool time is a good way to spend a hot Tucson afternoon.