The Endurance Ring part's collision mesh seems to have changed. In 1.0.4 I had a fully functional endurance craft with the landers docked to the inner docking ports, but when I tried to undock the landers under the new 1.0.5 update, the ship exploded. Testing in the VAB confirms. Edit: I have figured it out, started a new fresh save with minimum mods. I'm sure I made some mistakes porting my save from 4 to 5. Anyhow sorry for the trouble. Love the mod. Keep up the good work.4