you sound just like me! my rsd started in my left arm (fingers to elbow) then i had the trial... worked great! then my insurance kept putting off my stim implant... i was getting worse during this time... i had the implant... spread up to my shoulder and it just didn't help me anymore. its not that it wasn't working... it worked fine, it just didn't help enough. it different for everyone tho. i'd at least try the trial and see if u even like it or if it helps u. if u have any questions ask away!