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Hi Bubba, The reason the metal bubbled on the opppsite side is because the metal is streched or you shrunk it too much. If the bubble is hard in the center then you shrunk the metal too much. If the metal easy pops to either side then it wasn't shrunk enough. What works for me is to heat an area the size of a quarter dull red then cool with a rag drenched with excessive water. If you heat the spot to a orange color then it won't pull very well. The Japaneese were said to heat treat there swords at sun rise so they could compare the red color of the metal with the rising sun color. Depending on the bubble, generaly it's best to start on the bubble about 1 quarter size diameter from the non damage area edge. Use a small brazing tip, "O" size, with a slight reducing flame of medium to low heat. Heat one area then cool, then skip a quarter diameter then heat and cool, etc; Working your self to the center of the bubble. If you try to take too much area at one time then you won't get the shrinking action required. Another trick is to build a air water cooler. Take a piece of 1/4" tubing and braze a 1/4"npt female nipple on one end. Install a piece of 1/8" tubing at a 30º angle about 1-1/2" from the pipe nipple on the 1/4" tubing. Only insert the 1/8" tubing into the 1/4" tubing engough to sweat/solder/braze it to the 1/4" tube. Now install the 1/4" air/water cooler to a blow gun or air chuck. Thats it, Buy a piece of vaccum line to attach to the 1/8" tubing. Drop this 1/8" vaccum line into a bucket of water. Using about 20psi of air you should now feel air with heavy water drops. It takes a few seconds to pump the water from the bucket to the 1/4" tube end. Heat the area as I described above but this time hit it with your new air/water cooler. Becareful as I have used this tool to bend a radius on 24" "I" beams. T_Bone
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