Al,
I have had CRPS for over 8 years. Four years ago they finally tried a DCS (Dorsal Column Stimulator) on me. I have CRPS in my left arm from a horrendous mountain bike accident (near amputation). So the computer part was put in my hip and the leads were placed in my neck area. It was better than sliced bread, but the problem was that the leads would keep on migrating over to the right, thus sending all the stimulation down my right arm... wrong place. I had 5 revisions to try and fix it. On the last revision, I woke up in recovery and 15 minutes later suffered a stroke. They rushed me into emergency surgery and removed everything. It put me down hard for over a year. I would think about a pain pump before I went to the SCS. I'm just saying. Weigh all of your options carefully. It's invasive and has risks, but then again, everything that has promise to take away the pain seems to be invasive and risky.