What is the best 9-sleeve card holders for binders? I bought Card Guard, 30 for $5.00 and I'm not liking them too much. Those were the only ones I found when I was at target. They are a bit thick and wrinkly and they don't seem very clear compared to others. Their structure is also uneven and have weird flaps on the side. I remember buying the Ultra Pro ones before for other cards. Can those fit card sleeves as well(to basically double sleeve it)? And how are they? Can cards slip out? Etc..