Well, the non-standardized skeleton for the tower seems to have finally caught up with me. Making things for it now is becoming rather hard. I'm working on a railing for the staircase now. Unforutunately, it seems I can't just copy and paste it. I also have to adjust it to fit with the tower. This is going to be a slow process.
In other news, to avoid the mistake before, I've made a new "Tower segment". This'll be easily duplicated to infinetly build a new tower. But I need to focus on the main tower for now, so I've put that segment under ths island, where nobody can see it.