The earlier post about butt scratching over maximizing the strength of M/T joints in a thin leg led to this solution. I'm still not sure if it is the best but wood has been chopped and there ain't no going back.
I decided on using double tenons separated by a stub tenon as a way to minimize loss of wood in the leg. That decision meant a fairly complex markout. I've found the best way to attack that is to make a jig with the markout included. The jig has an additional advantage of insuring at least one wall of the mortise is vertical.
It is easier to show the jig that to explain how it works:
The blue lines are for working one side of the leg, the red lines are for the other side.
The last mortises I had chopped were on the just finished Moravian workbench. I will not say you lose the feeling for chopping with a layoff but at least I do. The first couple of mortises were slow and ugly. With a little paring they will clean up and be usable.
That slow and ugly begs a question, why? That answer, I think, is too much force. If it has been a while it is easy to forget "go slow to go fast" and you lose your "ear". By the third set of mortises the "ear" had returned and the muscle memory had as well. Then it was narrow cuts, tap, tap, tap, to the "sound" and the mortises went very quickly with one pass to depth and with clean walls.
As with most things in life, going Conan on it isn't the answer and is usually counter productive.
I took a day off from work and the shop yesterday. It was a fine Winter day in Southern Arizona with temps in the valley in the low 70's. A perfect day for a short hike in Madera Canyon. Madera Canyon is about halfway between Tucson and the US/Mexican border in the Santa Rita Mountains. The canyon is a major resting stop for migrating birds so we saw lots of cameras with huge lens and not many migrating birds although there were a few. BTW, I'd hate to carry one of those huge suckers up and down the trails just for a few really bad photos. Anyway a beautiful day for a walk in a beautiful setting.
MsBubba by a stream while still in the lower Juniper-Oak area: