twisted minis
+1y
I use a plumb bob hung over the center of the axle, draped over the frame, and draw that line on the frame with a white pencil, marker, or chalk, whatever floats your biscuit. Then measure side to side from that mark to center the notch. I don't move the notch forward for axle movement, I just center it stock, and put the axle there when its laid out, and try to keep it there also at ride height.