re: #525 Bubblehead II
Oh, I agree. Elon is being up front (as usual) with this. Slapping 3 Falcon 9s together to make a heavy lift vehicle is risky and as he stated more difficult than they thought it would be. The first launch should be spectacular either way.
Vibration is why NASA lost one whole design, had to start over. ARES if I recall, now we have the SLS and the Orion capsule etc on top