actually, they all pal around.................I thought they would, but I haven't had any problems, I was planning on keeping one in the 20 by it's self, I just can't figure out wich one I should put in the 55..........I have had both the tangs in the 55 for about a year now and haave never had any problems out of either one, I know lots of people are against having both together, and I have thought about seperating them, but I haven't really found a reason besides people telling me that it's a bad idea having them together.