Wow, this just happened to me a week ago with my 1/4" V. I was taking mine apart just to lube it. It is in very good condition, so I think it is a design flaw. The square stock is too small for the bends to have pressure applied to them for the removal process. They both just broke off with almost no pressure applied. I freaked when this happened. I just used my small picks to push it around to where I could grab the ring with small needle nose pliers and just pulled it out. Just pull it like a pull starter on a small engine. It will come right out. Now my problem is the finding of the ring.
I hope the kit comes with it, but have not seen one yet. If I can't find one I was thinking of trying to make one out of music wire. I'm not too far from Detroit in Ann Arbor, so if you find one local let me know. Oh yeah, I went in to Ace looking to see if they carried a ring like that and the the dude helping me kept trying to get me to trade it for some China junk even though I told him that it was my Dads and he passed away, so it was not even an option. He was like, BUT YOU CAN GET A NEW ONE!! He's is probably a good guy, but some people just don't get it.