I'll have to take some decent pics of my GBBs sometime.
I wouldn't worry about customs. If your item is completely white area (ie. not illicit) you typically have zero concerns. They may detain something that's questionable and even seize it, but you have options. So far my experiences with customs has been very fair and professional given that they are doing exactly what their jobs and the law instruct them to. Poor repackaging and damage to contents is unacceptable however I've been fortunate enough with the ones that've inspected my goods.