I got Sigma's El Presidente VIP/Something Special today and after mixing for about half an hour, dropped it. The vinyl didn't slip onto the deck very easily and as soon as I tried to mix with it I noticed that it was a really really heavy record. So I mixed it in, then out, but when I tried to take it off to play another tune then it wouldn't budge. I can get my fingers underneath it at both sides but I'm worried about pulling it too hard because I don't want to snap my new vinyl. Any advice?