It is good for hubris to confess stupidity now and again...
Typically, you pay around 15KT minerals per turn maintaining a ship with a stellar manipulation component. So, I thought I would be really smart and put one on a space station so I could get the 50% maintenance savings. Now... I will freely confess that I had, upon many occasions, tried to use my wormhole creators and gotten the message that I couldn't because I didn't have any movement remaining....
So, I had this plan to build a couple of base stations in one sector. The first space station would open the wormhole, and the second would close it. Thus, I could create a sort of DS9 effect.
So, I waited, and waited and waited. (I don't use the emergency build thing, of course). Finally, the wormhole closer came on line. Then, a couple of turns later the wormhole opener. Hurrah! I massed my ships to go through the wormhole. I powered up the stellar generators. I tried to open the wormhole. And it hiccuped! Sorry. No movement remaining.