It was big relief when it came loose, I had searched this site and read a bunch of posts where things didn't go easy. My tool was two drill bits loosely held in the socket and a long 3/8 wrench, like I had seen posted except he had used a file with a hole in it. Heated the caliper, squirted some Blaster around the plug seam, it just sucked right in! Then the dang thing came on out.
I know I should buy new, but I always like to not buy at all if I can. What the heck, cheaper than a tank of gas.....