And as a bit of an update on that reactionless thruster I mentioned previously...

Note the ten times lower weight than a proven space-engine design, nine times greater lifespan, and approximately ten percent greater thrust for the same electrical input. This is all versus the recently-impacted Ion-drive engine tested extensively and proven to function quite well in space. So sure, the thrust sounds unbearably tiny, but a working (and cheap!) prototype that can keep up with a multi-million-dollar bleeding-edge engine design? Sold.