Here is my version of the MMU, in the SPH: The MMU can should be able to withstand speeds of up to 50 m/s if hit on the front, 7 m/s on the side, and 12 m/s from the back. I only have tested it with about 3 m/s If you do hit something, the MMU will spin around. Don't worry! Just toggle the SAS and everything should be fine. This picture shows the MMU being tested by Jebediah Kerman: And here MMU being used to inspect damage to the Kerbal International Space Lab .craft: http://www./view/4ppt8qcxj226mat/MMU(2).craft Subassembly: http://www./view/beup9iej3f9rn4h/MMU.craft (Sorry for wall of text)