All i know is that to produce a good tone you have to mix different woods,
glues sure kill the sound because they act like a car suspension and they absorb the sound that is transfered inside the wood fibers.
But there are many glues and many ways to joint.If you press wood with small clamps the glue you add on the surface is a thick layer that STILL stays in the joint.
If you could find a hydraulic press you can prevent the loss,mine can press up to 500kilos pre sq cm that means if you press a 22 fret fretboard(46 cm x 6 cm[276 sq cm])on the neck with 100 kilos that i have used you get a 27,6 tonn on the fretboard wood if its not shaped at the bottom and curved at the top.that in some way cause the woods to be like one and the glue that remains lies on the pore of the wood and its not a thick layer between them.
Also please try not to bealive that the wood can crack because when i glued the maple top on the mahogany i used 250 kilos per sq cm.
So try not to waste the natures pores for a one-piece guitar.
Cheers!
