Here is another cello with a back seam that I glued from the outside. The seam was open at the bottom and there was a nitiacable gap that would not close. Here are the steps I used.
Unglue the right lower back bout
Wedge it up so I can trim and hand fit the lower part of the seam using a sharp knife
Keep checking the fit until the gap in the seam closes.
Clamp and glue the center seam back together.
This cello really needed a few cleats to help hold the back together. So I fished in about 4 cleats.
Once the seam has dried, the position of the block on the back needed to be adjusted.
Unglue the block from the back.
Adjust the alignment and regle the block.
This cello's lower seams were all messed up. Buldging out in some areas so they all needed to be reglued.
Normally in this situation, I glue one seam at a time and let dry for one day. If the seam is really bad you may need to glue several parts at a time.
