glad to hear that andy is off to Miami. Hope his comment doesn't mean his back has been playing up though. What's not clear to me is how vulnerable his back will still be even if the op has been successful.
I'm pretty sure he'll have seen the specialist again and wouldn't be going to Miami if progress wasn't satisfactory. However it's very possible there could be some residual sensitivity at and around the site of the op which won't take kindly to cold, damp weather.