Ive seen and admired quite a few "stitch welds" on here over the years. How do you guys make the weld (length) and spacing between welds so similar from one weld to the next. Is there a trick? Ive seen some on here that look factory. Obviously I know you can lay it all out before hand with a sharpie but for me it gets hard to see start and stop lines through a hood. Advise? How do you know how close/far to put them?