@FlGatorwood, I am not sure of the exact angle. The way I made it was to lay out the ratio numbers on some scrap and copy the angle. I took a scrap of cardboard and marked 2 points 7” apart along the edge of it. Then from one of the points, using a square, I drew a line perpendicular to the edge. Marking a point at 1” one this line. Then drew a line from the 1” point to the other mark on the cardboard edge.
What it ends up is a Right Triangle. 1” is the base and 7” is the altitude. The angle of the hypotenuse is the angle of the dovetail- 1:7
If that doesn’t make sense let me know and I’ll calculate the exact angle