When I fitted the top assembly I decided to color the inside black as the light color of the leather was showing a bit too much. When putting it back on leave out the metal bar as will be in the way when sewing. Pierce the holes while it lay on the table with cork underneath. Sewing the top strap is like sewing the straps. You just have to be extra careful that the thread does not cross when doing the stitch that goes over the edge. To sew this each thread was cut 59 cm long.
The metal bar cover is simply a piece of leather with the edges beveled and burnished without dye.
With the top straps in place we are ready to sew on the metal bar cover. Dont forget to put on the metal bar and put loctite in the screws. It would have been a good idea to make marks before sewing on the top straps but I forgot. Instead I pierced the leather a few places along the line to se where the stitch would be. I then made a line 3 mm from the holes. Sand where the metal bar cover will be and apply contact cement to both pieces and glue together. Trim the ends and stitch it in place.
Bevel and burnish the edge.