I'm fairly certain, in one thread or another, the topic of weightlessness in space has come up. Unfortunately, not having 1 certain point to stand on in Minecraft.. well.. isn't really possible to code (as far as I know) and would be extremely frustrating in survival. Having tethers, as has been mentioned before, would also be frustrating if it was the ONLY way to attach yourself to the station (I think they should be added as a last resort). However, I think there is an extremely simple solution to all this. Literally, if Mic just changed the gravity on the station to extremely low (Like I'm talking falling 1 or 2 pixels per second) It might make the whole experience just a little bit better. Currently, with the way space station gravity is, I find it kind of silly. Also, as stated above (This isn't my idea, and I take no credit for it), you should be able to have a reusable harness that can strap you to any block, somewhat like a lead, but you can grasp it to pull yourself towards the source of it. I dont know really, but I'll take anything I can get when it comes to making this mod more realistic.