Yet another of my forts, slowly turning into tower. made 99% by me, my team was busy making shitty stairs in the back (we won, I can't believe that blues wasn't able to shot off 3 blocks to turn it down)
Good side of making it alone was ability to make it "clear", with no stupid additions.
EDIT:
Another match - I've tested new design of tower
It's designed as alternative to most common full staircase - from my experience in destroying enemy towers, it's much harder to shoot down two thin walls with some space between them compared to single thicker wall. For enemy it looks and feels like 8-wide solid block, while it's much cheaper to made.
Another important thing is ability to repair - with single staircase you can't really see damages below you, with double every time you climb up you can check the second one for holes, and easily repair them using maintenance routes (every four blocks)
Such design also prevents enemy from hiding inside, because it's open from your side.
BTW. We won again - blues wasn't smart enough to shot off 5 blocks that supported our main tower.