So, Tracy set up an x-pen configuration that helped my buns be together 24/7 and yet kept them from killing each other.  It looks like this:

The entire pen was about 3'x6'.  The idea behind it is that the "L" shaped fence area broke the pen into 2 sections so each bun had their own and could get away from one another.  In addition, if a fight started, one of the buns could hop to the other area to get away and with the barrier in the middle, it broke up the natural urge to charge since something was in their way.  She put them in there and never worried again.

She continued with regular bonding sessions, pushing down the head of the aggressor to have them submissive to her.  The trouble is that we all know that WE are submissive to the buns - they're the Alphas.  In a strange place with a strange person, that isn't the case.

If you plan on doing this, I'd suggest monitoring them for the first couple of hours to make sure that one isn't dead set on killing the other.  Maryann only had a strong dislike of Dono, not hatred.

It was just made out of two sections of another X-pen.  I suppose you could make it out of NIC pieces as well. 

very interesting.  so how are they doing now? does she still have them?

Nope, after the second day, Maryann adopted the attitude of "Well, since you're not going anywhere, guess there's no real reason to waste the energy nipping you."  So the L has been removed and for the last 5 days, it's been just the x-pen.

The important thing is that Dono DIDN'T go anywhere.  The fact that he was in the same, close environment with her 24/7 made her give up trying to get him to go away.  I was told by Tracy that under no circumstances, short of seeing blood from a fight, am I to remove one of them from the pen for any length of time.  It would be a step back and have to start all over again.   In case of a major issue, the 'L' could be extended and simply cut the X-pen in half with two seperate areas.

They're buddies now.  Not quite bonded but getting there.

cool... thanks markus, i'm going to keep this in mind later depending on how things go after pinky is spayed.