My experience has been the same. My cPDA is pretty "lean," with a minimum of pages and covers cut from thin poly report folders.

When my cPDAs arrive from Levenger in the mail, I'm going to swap out the 1/2" rings on both. One gets small rings for the back pocket, and the other gets jumbos to hold all my map cards.

Speaking of small discs, you all may know this already but Rollabind no longer offers the smalls in anything other than clear.

Cheers,
Paul