@heisenberg34
I take it that's like an implanted type TENS machine idea. My physio suggested using a regular external one last year but those I looked at on the web would say expensive junk, not fit for purpose etc. in a lot of the reviews. I may yet give one a try anyway but I wouldn't be expecting miracles just some added relief.

I'd be very fearfull of having any kind of permanent operation. There was a scandal here not long ago that reached government level on TV news of botched spinal ops that had made people worse instead of better.
I suppose there's always an element of risk but that's done little for my confidence in going down that road unless absolutely necessary.

Thanks for the suggestion though.