I made this guitar from a concept by Ross Dearsley : https://www.artstation.com/rdearsley
Mini breakdown :
I used a 4096x4096 map for the complete guitar and a second map of 4096x4096 for the accessories (guitar stand, brush, dust etc..)
To save space on my guitar uv, I used a trim for the rope. I also packaged a lot of elements on the uv like the rope attachments and the tuning pegs.