I just noticed what was holding the spoiler up. Klingon cruiser, indeed.

I had to look up this magnificent feat of engineering. Apparently, it has been spotted at DragonCon, eons ago:

• www.flickr.com/photos/kt/4959539639
• www.flickr.com/photos/booturtle/6121100539
• www.wcnews.com/articles/dcon2005/daytwo.shtml (scroll down)