Interesting that the whole thing rotates. Ones I have seen that are similar have a rotating "donut" but a stationary core where 90% of the services (particular

Interesting that the whole thing rotates. Ones I have seen that are similar have a rotating "donut" but a stationary core where 90% of the services (particularly water) are. I think the BT tower used this arrangement. I guess that is cheating :)