I'll be thinking about you and General Patton and wishing good thoughts for both of you. I'm feeling the same anxiety, Harley is going in Friday for all the same, plus he's having dew claws removed (vet said dew claws will be painful).
I'm worried about a personality change too. I've heard they do change after being neutered ... but I love him just the way he is, so I sure hope not!
Keep us updated on him, I'm sure he'll be back to himself in no time.