Hey, everyone -- Thanks for the comments. Nomuse, you're right, it does have a bit of a Traveller feel (I used to play Traveller way back in the '80's). Yeah, the engines are a bit big, I suppose, but I actually based this on a little plastic model I built kit-bashing, probably in the late seventies or early 80's. The engines on that little model were even larger, compared to the size of the ship. (Wish I still had the plastic thing; it was about two inches long....) I'll probably reduce the size of the engines, or at least the length of them. Reaction mass.... Hmmm.... Let's see.... I think this little ship is actually powered by a non-reaction mass driver that employs Brownian physics; there are little spindizzies in the forward section of the engine tubes, and housed in the diamter of the tubes is a trans-magnetic force conduit that directionalizes the output of the drive. Yeah, that's it.... :o)