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[Helios]

Seems like some of them do, some of them don't. My own 2010 model (Tigrunner) with the integral Coolmate 3 cooler under the machine has a separate 120VAC plug on a very short cord, so when you use the TIG welder w/ water cooled torch, you plug the cooler into the 120VAC outlet on the front of the machine,...

[Helios]

I usually do the opposite -- convert TIG SiB rod into O/A brazing rod by heating the SiB rod and dipping it into borax. Works great.

As for converting coated O/A brazing rod into TIG brazing rod ... bust off the flux and give it a try. I bet it will work.

[Helios]

Are you allowed to MIG weld that kind of thing? I thought it was like a CrMo airframe, where it had to be welded with O/A or TIG to get enough heat into the welds so that they would "normalize" to some extent? Where are you getting cracking? On the MIG welds?

Is it "legal"/"allowed"...