How practical is this trick? Do you need to have a large distance between yourself and the audience to hide the gimmick? What are your thoughts on the quality of the prop(s)? and does it require refills at any time?

Thanks

Sorry to answer such an old thread but here is all you need to know unless you want to buy the prop already made up. You can buy that from Denny as well. http://dennymagic.com/products/?view_typ......h_in=All

Or locate Martin's book and it will give you all the details as well.