Looks nice. Is the progression in case size (small head, medium centerband, large nib) and in wood length (short lower barrel, longer upper) intentional? I usually try to match the length of the wood on the two halves, and the brass on the head to the case shoulder (and I prefer a smaller centerband). But those are simply esthetic choices.
Out of curiousity, how did you attach the transmission coupler to the case head? When I did a perfect fit like that, I retapped the piece that the kit finial screws into, and put a small screw through the flash hole. That, in turn, was covered by an empty primer cup.
Regards,
Eric