this is my cannon it is 16.5 tons it can launch a kerbal extremely high. action group 1 toggles ladder action group 2 turns off the lander engines action group 3 starts the cannon(don't start the engine until u have it throttled up) her are some pics but the legs are moved up a tiny bit for better stability http://mattjax12.imgur.com/all/ the gimbal on the engine can change the angle a little. there are also 4 docking ports for refueling it is very easy to move around on the mun download: http://www./?5s7rcu8q8ht5i93