My Sleipnir II rocket works beautifully. It has gotten me to the Mun and beyond many times. I have the Probodobdyne OKTO and science modules protected beneath an AE-FF1 Airstream Protective Shell. I tried to add four LT-05 Micro Landing Struts to the side of my SC-9001 Science Jr, and even though the struts were completely encapsulated by the protective shell, I cannot get the new Sleipnir II rocket beyond 2000 meters in the air before it loses its balance and spins uncontrollably. Has anyone else encountered this problem? How did you fix it?