woody, my mom used to get myobloc injecions for essential tremor. Myobloc instead of botox because it tends to migrate less. It was completely effective sometimes for 6 months. The doctor would find the muscle in the arm that had certain frequencies at rest. She had a machine that located the muscle. The injections were in the forearm.
There are so many minimally invasive was to resolve back pain. I hope you pursue that avenue.
You trusted yourself about the gabapentin and proved yourself right. Cheers.