I saw a post on this forum of someone cutting for a scarf joint using a hand saw completely freehand and that was inspirational, but I knew that I did not have that kind of skill. So I designed the jig, yes, from scratch, here are my plans, my mistake placing of one of the dowels is crossed out and repositioned to where it should be. Who knew that trigonometry would come in handy some day.
I have started sanding the joint faces using this home made sled
One done