Oh, Stacie -- I missed this thread until just now when I saw the Bald Bostin Butt update. I'm so sorry that your babies are fighting.
As Dr. Fitzgerald said when The Snuggler started beating up Mr. Whiskers, "Man, those testicles are nothing but trouble!!!".
Kelley, I have had 3 males neutered, all by and on the advice of my veterinarian, Dr. Kevin Fitzgerald, the renowed Exotic Vet (his office is less than a mile from my home).
In both cases, I was able to get the 2 males that had been fighting bonded again and living happily together.
As far as their behavior after neutering, they spend most of their time snuggling on top of each other in their fleece tube, comparing recipes and making pies. :thumbsup: LOL
As I always say, though, you MUST remain vigilant and be able to separate them at a moment's notice if they decide to fight again. You should ALWAYS have a spare cage at the ready for just this purpose.