Gustavo came to Uruguay a few weeks ago and he showed us how he makes reeds. There's not much theory involved in the process. He uses four wires just because he doesn't use any kind of wrapping and also for the reed to fit better on the bocal avoiding any kind of up and down movement while playing. He forms the tube with all wires on and puts the reed on the (Rieger) mandrel far beyond the mark (up to 8 mm), then he lets the reed rest for 24 hours on a mandrel tip to finally (after taking the reed out from the mandrel tip) store the reed on a box for an undefined amount of time. Pretty simple...
I took a few videos of him while making reeds, I'll add some more details after watching them again.
Principal bassoon - Orquesta Filarmónica de Montevideo
Bassoonist - Orquesta Sinfónica del SODRE
Studying with Prof. Ole K. Dahl