Once all twelve strips for tip and butt sections are lovingly planed to satisfaction matching tight taper specifications they are ready for the big commitment of gluing. The glue, believe it or not, is off-the-shelf waterproof Titebond III. The big guys use it so it must be OK.
No turning back now.
This Rube Goldberg machine tightly wraps string around the glued up sections while they dry. Wrap in both directions for maximum compression. I pre-tie the strips every six inches or so with wire to get them aligned perfectly. That assures the minute tip section strips do not twist over each other when machine wrapping. The heart of the build is now done and once the glue is dry and excess is scraped off the proof will be in the pudding.