Good luck! I had a great (well, no surgery is fun but I didn't have any complications and the care was good) experience with Dr Greenbaum. He's a great cutter. Just follow the advice of the vets. Also follow the phases of food, but cut down the carbs as most of the dietary advice is based on RNY> IMO.
I never met Lisa (his nutritionist) when I was in hospital, I think she was on holiday or something. I met someone else (can't remember her name) and took the handouts and followed the food phases and nodded and smiled at the rest...