I've aready build same rocket with killer plane (you can easy land using different plane/collision group). You right, pals, new age of rocketry just begin =)
That was first thing I've try to build on beta5 with gears. Unfortunatly it can't be used with high speed/heavy load (like realistic vehicle) due to weakness of hinges and a lot of friction.
Recursion, recursion -) use two rateoffire1,2 and you can shoot both (canon+gun). Btw, did you see my "Tunguska"? I've made smoke effect of shooting too. 8/10