I must admit, the extension to the basic cannon gives it quite an extra punch. I'm wondering though if you could make it so you don't need to press 2 buttons. Here you go. I doubled the amount of TNT used as gunpowder, so it has a bit more punch to it now. Also, I still prefer the button version simply because it's easier to time the explosion with them. http://www.youtube.com/watch?v=Ks5IlOloRLc