@MiraZaWitch I borrowed this little snippet from KSCExtended and got it working with RSS, just put this in a new config file and it's all set.
@STATIC:NEEDS[RealSolarSystem]
{
@Instances,*:HAS[#CelestialBody[Kerbin]]
{
@CelestialBody = Earth
}
}
@Kopernicus:NEEDS[RealSolarSystem]:FOR[KSCEnhanced]
{
@Body[Kerbin]
{
@SpaceCenter
{
@radius = 9000 // 1500
}
}
}