Hello Everybody, I have tried this Hack tonight for the first time. I have to admit that I do no longer have crashes when developing my big crafts, but I get the bug "empty athmosphere", i.e. no drag at all... I have replaced the following files/folders: KSP.exe KSP_data/mono/mono.dll KSP_data/mono/etc/ (the whole directory) KSP_data/Resources/unity default resources KSP_data/Managed/UnityEngine.dll I'm using a huge amount of mods, but not FAR or other physics modifying mods. Does anyone have a solution/workaround for that? Thanks in advance Cheers