I´m not the fastest for replying either, so it doesnt matter Should have thought on the log files... my bad. Thats weird... just wanted to recreate the bug for the logfiles, kept the savefile for that case, and it didnt appear. Tried it a few times now and the hangar works just fine, no missing buttons or out-of-ship-vessels. Definitly wasnt your mod then, I´ve added and updated a few mods since then...maybe that fixed it. Sorry for wasting your time :/ Well I started already a new game, wasnt far anyway. Keep up the good work, it definately is one of the most overlooked things in the unmodded KSP!