If you have a mill one of the most valuable tools would be a dro, digital read out , I cut all my dozer links, and pads. I did try to make them in runs, not individually. A lot of repetitive work but my dozer tracks are holding up well. I made the pin out of brass and the brass wears out first. Very glad it is the wearing part as they are easy to remake verses the links. Do you have any pics of the broken track pieces? I'm curious to see where the stresses are. Could possibly help more