Welcome to the HealingWell Chronic Pain forum! You will really enjoy the members here, as they are very helpful.
It looks like you have been through the ringer, with all of the surgery's you have had. I'm not an expert on the implants, but there are a few members here who have delt with them.
I might suggest that you post a little more information about yourself, so that the members can better direct you and or answer you're questions.
What type of system was implanted (who was the maker)? When you first had the implant, did it help you? What types of pain meds are you on, and the dosage? Are you going to a PM or a PCD? So sorry for all the questions, but someone is going to ask them here sooner or later.
I'm sure there will be a member here before long to better answer your questions.
Again, Welcome to the forum!