Yes, it likes to tip over right after launching. I'm not sure exactly why, but I'll look into it. Thank you for the rocket, it looks great! I'll try it out today. EDIT: I tested it out from Kerbin orbit and on the Mun. The rocket worked perfectly, it is a great design. It had a little trouble getting off the ground due to my ridiculous payload, however. The Kerbin test worked well and the probe survived, but the Mun test failed. The probe smashed to pieces on the surface. Basically, lithobraking like this is stupid, as in an atmosphere you could just add parachutes, and it doesn't work well outside of atmospheres unless you slow down a lot. You might as well land normally. Thanks for your help sgt_flyer!