I was able to get the Aeris4A around the planet a few times and back to KSC AND land on the runway WITH fuel to spare. So happy! I also went on to start constructing a launch vehicle to start putting a space station and its parts into orbit around Kerbin. The vehicle on it's first unmanned trial run was extremely flimsy and didn't have the power I would have liked, but did get the Aeris Space Station Core (yes, the new station will be called the ASS ) up there, albeit barely and left a large hunk of junk in orbit. The junk has a small amount of fuel left in it, so when I get a shuttle capable of docking with the station up there, I'll hopefully be able to rendezvous with the junk and suck the fuel out of it, then use the shuttle to deorbit it (hopefully). Another alternative is, because it's a Jumbo orange tank and I believe it has decouplers on tanks that are still coupled, I'll redock the tank on the station and drop the smaller rockets off and hopefully deorbit those and leave the large tank attached to the station. Then I can use the large orange tank as fuel for other things if I so need them.