Very beautifull!
You can see by the orientation of the weave in the red guitar, that this is also multiple pieces. It is nearly impossible to do this in 1 piece. The back is a piece and the side is another piece, after that you can back it with overlapping sections for strenth. His minitature black sunburst on the edge must take a tremendous ammount of skill.
By the way, it`s not certain that is red fabric, it could also be the semi transparant epoxy dye (especially since the wooden top he has matches perfectly), this is one of my old test samples with that stuff (3% in this sample) :
The patchwork looks like a very smart and creative way to utilise cutoffs (i could be wrong, it could be made from new fabric from the roll). I do think they were at least 1 layer thick cured pieces, and then cut and sanded while it was already hard and then glued onto a 1 piece backing. You can not lay the soft fabric without having all the fuzzy strands going open at every edge, it would not look this clean (the red dye sample above shows what i mean with fuzzy edge).
Maybe if you put spray glue on the back it would sort off remain together, but it would just be very difficult to handle, and line up the pieces.
Anyway, i love seeing so many people doing creative things with this, and putting their own spin on it. Carbon is a long process to learn how to handle it, but the amazing versatility makes it all worthwile.