I just purchased a marbles tang sight from a guy on eBay. I put it on my 1894 357 mag everything seemed to be ok till I moved it forward towards the hammer and it felt like something gave. Well now all it does is flop back and forth and will barely stay in the slot. What gives? What is marbles warranty? Should I try to get a refund or try to send it off to have it repaired. I paid 77 bucks for it which is cheaper than what I paid for the one on my 1895. What to do?