This is a pretty huge structure, the height is variable, I generally like to make it pretty high but that depends on materials and need for this (a lot of bomb jumpers). The right one is a slightly more refined design of this structure, as it allows easy upgrade in height (since the top is not made of castle walls). I normally start out with a 2 thick wall of castle walls and work my way up (so that enemy bomb-jumpers get stopped as soon as possible) and only upgrade it with the "string" of teamladders etc if enemies keep jumping in. Gonna be honest with this one. Its more of an odd one. I rarely build this, most people don't bomb jump a lot. It's also a very good catapult platform.