I have been building a roll cage for my truck using 4130 .120 wall. I am using RG-60 1/16 filler rod. I was told today that it will not work and that I should be using ER-70S6. The welds that I have done so far look good to me and I am wondering if the RG rod will hold. I am also looking for anyone that has any used GTAW instructional DVD's or VHS tapes they would be willing to sell. I am finishing up a school here in Memphis but I feel like there is a lot more to learn. The school was mainly a beginner school and I have not had much luck finding an advanced tig school. Any help would be greatly appreciated. Thanks, Adam
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Filler rod for 4130 Tubing?