Adding the wings was pretty straight forward. Trying to shoot brad nails accurately into a mitered edge was not that easy. Most of the misses were not visible.

The spacer ring was routed with the good old Jasper Jig. After all the speakers I have built, I had no "inner circles" left in the scrap bin. So I had to cut 4 new ones out of scrap for the phase plug. It would have gone smoother had I remembered to add an inch to the Jasper diameter for saving the inner piece. Yellow glue and brad nails took care of the assembly of the plug.