I worked on the headstock and rosette yesterday.
The headstock is bookmatched ziricote - I had to join the halves just as I did with the soundboard and the back plate. I received the wood sight unseen but knew I had to use it for the headstock even though there will be no other ziricote on the guitar. In the "white" it's the same general hue as the EIR rosette so I count myself lucky. I have no idea how it will age. I don't care though; I thing it sort of looks like a flaming torch.
Working with Zip Flex for the rosette was remarkably easy - maybe even easier than working with the wood fiber purfling strips. I haven't glued it in yet - though I've read that CA glue is okay to use and I have some shellac on hand to seal any open grains. Zip Flex is made of a product called "Ablam" which means that it's technically a laminate, so I'm not sure how far I can sand it.
BTW, I made another montage video. I'm just having fun with this.