[Surgeon says he has done 4 people with CRPS and all have recovered well and no symptoms after amputation .]

I'd ask for many more details about that and/or if you can talk to those people.
And if that is true many others w/ RSD/CRPS would be interested to learn about the details too.

Is this surgeon , chosen by you or a work comp choice?
IF a wc choice I wouldn't believe too much..
They want to do X and hope it gets you off their payroll..but if it makes you worse who will take care of that, they can say we tried X but it didn't work out..

Do you have a comp atty on your side, do they understand about RSD/CRPS?
Most likely is a life long condition and may spread later on..

You might do some reading on our SSDI forum, the sticky threads especially - getting signed up for that now might be an option too.. getting ducks in a row so the speak.. for your future..
http://neurotalk.psychcentral.com/forum28.html