Also, backing up one step, you need to put the spacers between the barres in place. I made new ones because of the others being multi piece shims and corroded. Tin them as well and flux them. I only had two spacers evenly spaced.
Once the ribs are in place and set in the barrels as you want them tighten the wire. Be careful. You can generate significant forces when you tighten wire.
Check and double check the position of the ribs. Once satisfied, next is the leveling of of the barrels (ensuring no twist). Check them with two straight edges (see pics)
