Anyone know of a good cheap source? I found one I really like on ebay but it's $45 after shipping There is one guy on ebay selling one for $2 but he said he's not responsible for any damages so I don't think I'll trust that one. (he's the only auction with this warning). I did see the list of components needed to make your own but the instructions kinda lost me otherwise I would spend the $6 in materials. Know of a better set of instructions?