Wolfgang Jellinghaus
I build my Signature guitar with double top, a sandwich of nomax between two layers of solid, but very thin Cedar or Spruce tops (Thuja plicate, Picea abies).
The neck/body joint combines the construction of the traditional Spanish heel with a free floating fingerboard, in use for violins since centuries.
The idea behind this was to get back all the flavors of sound character from the full size guitar top, and not squeezing the upper bout of the top between the glued on Ebony fingerboard and upper harmonic bar.
For back, sides and bridge I prefer to use Granadillo (Platmiscium yucatanum) wood from Mexico, a traditional tonewood for Marimbaphones and very close to the wood data of Cocobolo Rosewood and Madagascar Rosewood. The logs I select at the source and cut them into tonewood by myself. Granadillo is not endangered by CITES term.
The sides are double and have a second layer of Cypress inside.
My customer gave me compliments for the quick respond, separation, long sustain for the bass strings and singing trebles.