So i did this on my 12 bolt i have under my truck right now and i didn't seem to mess anything up.... I always wondered if it warped the tube when i torched off the spring perches and welded on new ones. Now i have to take off the spring perches on my 14FF.... IS it okay to use the cutting torch on the cast perches and leave about 1/4" of metal between where you cut and the axle tubing.. and then grind down that last 1/4" ? Will it distort the axle tubing? How bout when you go to weld the new perches, should you only do a little at a time and let it cool?