Hello everyone.
I have a problem with using shells.
Although I am au fait with a deck of cards/pair of laccy bands/box of teaspoons I am ashamed to admit I know very little about coins and have no practical experience with them. In fact I have avoided coins completely since I got into magic.

I have finally got up off my a*** and ordered Bobo. In the meantime, I have bought a few shells and I'm going to amuse myself with these until my book arrives.
My problem is relatively simple and is no doubt due to my ignorance on the subject. It also may expose the workings of a certain trick a little bit, so can I PM someone on this?
Regards,
Mark