Great info Steve!
I had similar emails with JI as well a few years back and he said the same thing about the red fin can.
I have some Enerjet 2-page fold-out fact sheets on the 1340 and 1340/20.
One part I haven't found yet is the 0.1" exposed shoulder payload coupler for the 1340.
Email me and we'll discuss some things further.

christimm@chartermi.net

Now I must go and check over the big-box-o-rockets for Saturday's launch.

WOO-HOO!