Hi Jim thanks, yeah the old metal apparently goes through some changes over time not to mention the formulation is different from todays metals. Its been really arduous to not make small holes large ones. Do you have a build thread?Ron, I'm having the same issue on my floor pan ... keep blowing through the new pan cuz it's so thin. I turned my heat and speed way down and it seemed to help. Using a piece of copper is a good idea. PS ,,, I am jealous of your progress ... keep up the good work.