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It's not currently finished, but here is the construction to-date of the MFS Station 3: First module enters orbit at the designated station altitude of 70km. This is a habitation module comprised of four stowaway containers and two cupolas, with lots of docking ports, RCS, ladders and comms. Launching some girders to connect modules into a box shape. Above the girders is a very simple RCS tug that will be used to dock the girders with the modules. Docking a girder with the first module. It turns out this is super hard to do off-axis and most of the girders fall away into space when you try to separate one. Overall this girder lifter/tug design is terrible, but you can usually get two of the four connected up per-launch, and I can't figure out a better way to launch them. First girder attached and its solar panels deployed! (the station is way overpowered, each module is self-sufficient from generators, so these panels are mostly for show). Enough girders attached to dock a second habitation module (identical to the first, putting the total crew capacity in the mid 30s, although only about 20 kerbals are on board at this point). Moody More girders attached, now bringing in a fuel module - half monoprop, half liquid fuel. The intention is that ships will be able to dock in a low orbit and pick up new fuel. Instead of cupolas this module has the large docking ports at each end, to give me more options. Bonus points if you spotted that I forgot to put struts down the long axis of this module. Made it super super unstable when docking. Also there are now so many damn parts that the simulation runs *extremely* slowly within 2.5km of the station. Three modules docked together with a simple unmanned refuelling rocket attached. This will dump its fuel into the station, then detach and de-orbit. You can also just about see two of the girder tugs docked behind the middle module. I figured they might come in handy for something, but if not they can be de-orbited with only a small sacrifice of the crazy amount of monoprop the station holds So there it is, as it currently flies. I need to lift up 6 more girders (so probably 3-4 more missions for that) and one more module, probably another fuel module. I'm not sure if I will finish it just because the game gets so damn slow, it took well over an hour to dock the first fuel module and then it turns out that they are a few centimetres different in length from the habitation module, so only two of the three docking ports are able to lock. Bah!