Yes, for me it is broken in 0.21. When i use the Template (the Stock Version), it will not release all Launch Stability Enhancer. The first stage is working correct, the Second stage only release one of the Enhancer. But all 8 Enhancer are in the same Group. All Stage Groups are broken, but when i try to delete the old Enhancers and add new ones on the same position, they can not be attached. They are always colored red. In this Case, i can't rebuild the Shuttle, when i try to add the SRB, the Game begins to Stutter and Crashes to Desktop. And the Landing Gears are missing in the Componentlist. I love this Mod, because i like the STS Missions and this Shuttle is perfect for me. I hope it will work soon in this Version... Sorry for my bad English...