Thinking about stimulator or pain pump for chronic lumbar pain

I had a spinal fusion in 2006 and have been dealing with chronic pain ever since... I stopped using opioids later that same year and ever since my pain has largely been uncontrolled. I've tried TENS units, all kinds of other meds, physical therapy, daily exercise, and psychiatric interventions and my life still is very limited by problems caused by chronic pain. Im thinking about a stimulator or a pain pump but curious of others experience. I regret my fusion so im very reluctant to have anymore surgery. I was totally against a pain pump until I found out that medication doesn't cross the blood brain barrier as I developed opioid dependence and misuse following my fusion. I dont mind being dependent on a medication but I dont trust myself to self regulate my use of oral pain medications for more than a few days max and that's only with having my spouse overseeing what im taking. Im specifically interested in how painful the procedures are as again i dont trust myself to be on oral opioid meds for any extended periods of time.