It is time to put the back on #138 & 139. It begins by finding where those back braces are going to cross.
If you clamp the back in its proper position you will be able to mark exactly where the cross braces are going to be.
Now with a sharp blade cut out the notches and test the back for fit.
The fit is good. Brush glue on the edge and the tentalones and clamp her down tight. I always clamp the instrument back down to a flat installation jig. That way I assure that the back and neck will be flat.
Four or five ho.urs later I took the clamps off, trimmed the edges with the router, and these two ukes are Boxed.They are looking good. The next challenge will be installing the binding. One of the triplets is seen in the background. They are almost finished with the French Polish. Then comes installing tuners and bridge and saddle, and pickups.