I'm currently building a station around Laythe, mostly because it's such a nice view ! I've fired 13 overfueled missions to Jool. I'm currently aerobrakiong them to Jool then Laythe (it's easier than I thought), I'll assemble them when i've decided which altitude to put the core station. The goal of the station is to create a base of operation to explore the Jool moons. I want to send enought fuel to refuel each ship 4 times. It's my first mission to Jool. Parts to be assembled àLaythe (each is a separate launch) : - Core station (lab, cabins...) (manned) - RCS tanks + station small tug (unmanned) - 6 autopropelled Orange tank (delivered full) (unmanned) - Ferry with Tylo SSTO and Bop SSTO (manned) - Ferry with Vall SSTO and Pol SSTO (manned) - Tug for Tylo shipping Laythe SSTO (unmanned) - Tug for Tylo and secondary Tylo staged lander (unmanned) - Passenger ship (the rest of the crew). Total 13 launches The station is not assembled yet but will probably weight 400T. I've already inserted only 5 out of 13 ships into laythe orbit. I'm not too sure about the station orbit altitude though. I had planned for 70km, but I'm considering 500km as most of the flights will be outward and not to the surface of Laythe. Further more, I think the 500km view is nicer I launched the passenger ship and the station manually, but used MechJeb for the other ones. I plotted all nodes myself) but executed most of them wit MechJeb (well I letMeckJeb planned the last 6 fuel tanks, but I had to make 500dv corrections after that). I play KSP for less than a month now, so I feared to not be able to aerobrake twice at Jool and Laythe. So I overfueled my generic two staged rocket. I did part of the last Laythe inclination correction with the last fist stage engine... Maybe if I dock with the second stage still attached, In could gather more points My generic heavy launcher is Second stage : 40T 3800dv (4 LV-N and 4 dumpable LV45 for boost). I can switch to medium to low TWR. This stage weights 50T (I think) First stage : 100T 6000dv for take-off with reasonable/high TWR. It weights 1000T. As I said : a bit overfueled, I said I designed a smarter stage before which was able to carry 70T to 90km orbit. But my second stage was only 3 LV-N and i hadn't enought TWR to do a quick escape burst. As I was managing 13 launches (+1 addition Jool probe mission unrelated to the station), I wasn't sure I would be able to handle multiple burst for each escapes. So I oversized everything to make it easier... Pictures will come when the station is built.