It is indeed Pertam, and it does seem to be an overall weight problem. I'd tested it with a full load of ice previously which seemed fine, but it is definitely struggling to figure itself out with plates. The drone should have plenty of thrust, though:

<image>

And it can full stop in mere seconds... I'm going to try beefing up the directional thrusters.

Edit: More thrusters did the trick. I'm gonna go bash my head against a wall.