Will this hurt my cards???

[Johnny T]

I'm a binder set builder for much of my collection and I used to place them flat with no more than one binder on top of the other. Well my sets are becoming more and more plentiful and I'm running out of room. I've seen more than a few collections where the collector places their binders in a bookshelf vertically and obviously that frees up a lot of space. I use only Ultra Pro's collector's album and Ultra Pro Platinum pages.

Here's the question: Do I run the risk of the cards bending or any ruining of condition from the pressure of being held only by the 3 ring binder if I keep them this way? Or should I just go back to laying them flat?

What do you do? Thank you in advance for any thoughts on the subject and why you do what you do.

JT