Ok, the two keyways, are approx 25Degrees to each other, so I assume this is for different models.
If you look at the PNG I've attached, looking at the Blade part. You will see which way they turn, and imagine I am to the left, so they will be pushing me backwards. This is if I follow the direction the starter string. It also makes the points cam go in the direction shown in the sketch. I assume the points follow the cam till it 'slowly' closes, then hits the sharp opening shoulder.
If this seem correct, then there are only two keyway choices. I have chosen the points opening 2-3mm BTDC, this is producing no firing at all. The other choice of keyway would bring it 25 degrees more retarded.
