You first remove the ribs and clean the soldered area of the rib and tubes, then you tin each area. The next step is to wire (soft iron) the ribs in place and firmly wedge them in place using cut nails. The whole assembly is then heated and additional solder added so all are attached. The extra solder is cleaned off the tubes polished and rust blued. Rosin is used for flux to prevent after rust. I haven't checked prices recently but I would think starting at 750 is a good guess??