I'm going to pinch your method, but with a variation: mine are/will be all laminated, so the tape won't harm the cardstock.My overlays (EXC: Ocean, Beach) are taped to sheets of paper. The paper is in a page protector, which is in a binder.
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Advantages: overlays are easy to find; overlays already have their tape.
Disadvantages: Other methods might take up less room when traveling to a tournament.