From my experience, most of these procedures are very successful, but like all surgical procedures, there are some that don't provide success. If there is a valid, documented method of avoiding surgery, I would give it a try.
Good luck on whatever you decide upon,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)