just curious what your best "trick of the trade" is? I thought it would be interesting to see what some of you guys had to share. i.e.refering to the suction line, "if its sweaty its ready". that one always amuses me although i would never use that as a diagnostic tool. a more realistic trick would be when i squirt silicone into a lineset hole i spray a little soap bubbles on it. it smooths out real nice and doesnt look like a 2nd grader filled the hole. i use a piece of tstat wire on my b-tank to keep my tank wrench handy so im not searching for it. for fishing tstat wire down a tiny hole i keep @ 15 feet of chain in my bag. its the same kind that banks use to stop you from stealing there pens. just wiggle it up and down and it usually finds its way through that tiny little hole pretty quick, no cursing needed. switching 2 legs on a seized 3 phase compressor to free it up. nothing earth shaking but every little tip helps imo.