I did indeed feel under attack (thank you,
Kestra, that was sweet of you

), but as I said, no offense taken. I suffer from horrible migraines and know all too well how permanent pain can influence even the most patient person.
Since no harm was intended on both sides I suggest we call it a draw.
Peace?
*holds out hand to Admiral Young*
The problem with surgeons is that they see the patients only untill they get prostethics, so naturally they can't know about the problems occuring afterwards and so they don't inform their patients about them. Therefore it would be a good idea to speak with people who underwent such an amputation. They could tell you all you need to know.
What I worry about is that the pain most likely won't stop with the amputation, you'll just trade it in for a different kind of pain. As the prostethics will change your legs' mechanics, weight and balance, they can trigger problems with your knees, hips and spine. Since you already have a certain damage in some of these joints, it is likely that the pain there will remain or possibly even get worse.
I'm not trying to talk you out of the amputation. It is up to you to decide this matter and nobody can take this weight off your shoulders. I am only trying to prevent you from getting disappointed if the result is not what you expected.