If you do make another, keep in mind the two options, use the formula, and base it off this bow you just built, or copy this bow exactly, and put enough deflex in the new one to match the just unbraced profile this one has. That will compensate for set either way you go.
I like your finger splice jig. Mind doing a thread on that?
The backing glued upside down may very well be the cause of that splinter. Not a smooth surrface, wood will pop.