Hi Aardvark,
Yes, there a few of us who have built this kit. Take a look at my Sub GB to check the WIP of Plasticjunkie's build. Completed pics on page 18 of the thread.
http://cs.finescale.com/fsm/modeling_subjects/f/29/t/171539.aspx?page=1
I build one as the Puffer launch but I don't think it would be of much help in your build.
http://cs.finescale.com/fsm/modeling_subjects/f/7/t/170521.aspx