I glued a dark brown veneer inside the slots for the classical guitar (nylon strings :
When you look at the back of the head you will only see carbon fiber, the slots for the classical guitar tuners are not visible from the back like this :
Here are some different sound hole options, i am thinking about.
As stated earlyer, the body was to thin so it could be dented, thin is good for vibration, but a ploink sound when the back pops back is bad.
This padouk wood strip will stop that.
Gluing it in :
Neck mockup (sideview of the fingerboard with binding, and carbon fiber neck (not sure if i like it).