My first try of a Pillar, the Pillar was build in Vanilla and a quarter of the Fortress was build from my scaffolding i build :D. That was the point when i decided i don't like farming anymore :D.

I tinkered with a few different turret designs but kept the Keep itself relativly basic for me.

I guess 2 of the turrets will crash when you place it because i placed them on stones in the Landscape