Well here's how I learned about using transfer punches!. When I was kid I knew this OLD machinist and one time I was watching him make some adaptor for something(don't remember what it was for)and I asked him if he had a blueprint for the pattern, and he said there ain't no blueprint for it and who has time for that just pay attention, he whips out the transfer punches screws them in and lays the material on and taps it, drills it and it bolted right on, at the time I was totally amazed and that's when I went and bought a whole set and been using them ever since, and I just can't see doing anything different!..
10-4...................