I have a case-it, basically a binder that has additional pockets and can be zipped closed. I like using the plastic sheets, e.g. 9-baseball-card-pockets, to hold the standard size carded pins and perfect fit for the case-it. But for those who use something similar (3-ring binder style), what do you use to hold the non-carded pins? I'm using foam sheets that I put in a document cover. It's extra work to pull the sheet from the cover and then put it back in. Any suggestions?