@Janus92How should your kOS script for booster landing work? I have noticed that after the ship circularise burn, kOS automatically switches to the booster what has already coasted too much so not possible to land back at KSC. But when I use FMRS mod, when switching to the booster I can't open the kOS GUI. When opening the panel it says: waiting for command.. Turning on and off doesn't work.