I use variation of this *http://tinyurl.com/5wsefn *Small aluminum cups with glass top cover in an aluminum case. They come in various sizes. I keep each customer's sets of parts separate from each other and my own this way also. If you do use this, write the pn on the glass top AND on the inside of the cup below. * * -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist