TOB

Hi Guys, I've a stand booked at Summer NAMM in Nashville in mid-July, however the guitars that we will be demonstrating have a small amount of Indian Rosewood in the build and would normally be subject to CITES as the wood is an endangered species. Does anyone have any experience of what paperwork I need to prepare, the goods are not for sale in USA only for demonstration and would be re-exported back to the UK immediately after the show? ...or has anyone used a 'Musical Instrument Certificate' to take instruments in and out of USA via hold luggage, this seems like it may be the better option? Any help/ advise would be gratefully received!! Thanks in advance. Toby