I bought my CNC to make these Tribute Guitars picture frames for concert goers. I added a J Tech Photonics Laser to it as well. So guitar neck I do inlay and others I burn. Each guitar gets a leather strap with the concerts setlist burned onto it. So you have the band name, a picture with the band members, a place for them to sign, the event date and location of the show plus the setlist. They look great hanging on the wall!
Add a place for the ticket stub? Perhaps add fake guitar strings which would allow people to stow keepsakes such as the ticket stub intertwined in them?
Offer an option to have a round area more in keeping with the traditional shape of the soundhole? (and which would afford a larger area for signatures)
Make an inset area for a CD in a plastic case to be stored?
Add some metal guitar hardware(frets, tuning knobs,etc…)-even if it isn’t the real thing…some bling brightens everything and adds an element of authenticity!