Untethering the spinal cord

I'm considering having this done. Brief background, c5-6 complete injured in 94. Started with mild pain around 99 that has since become completely debilitating. Have tried all conservative measures plus pain pump and neurostimulator. My understanding:

- should not consider unless pain is "late-onset" (1 year+ post injury)
- about 50% realize reduced pain
- 80%+ realize halted progress of damage related to Tethered spine (minimal if any return of lost function)
- many surgeons will not perform procedure strictly for pain relief. Must be loosing function/sensation

My pain was late onset. I have no loss of sensation or function. Just ever increasing pain. I'm not a tough guy so, that's plenty ;-)

Questions:

Are points above inaccurate in any way?
Even without loosing function, is it unwise to pursue strictly for pain relief?
The 50% who realized a reduction, are there any studies that show how much pain was reduced (25%, 50%, etc)
Would anyone who has had this surgery discuss their experience?

Note: I fully realize that the ultimate decision is on me. So, will treat feedback just as friendly advice.

Greatly appreciat all responses.

Untethering the spinal cord