Didn't you ever wanted to create your levels much faster?
I always loved the segment-based system, which was made in FPS Creator.
So, I created something like it.
Brave the Segmentor mk. 1.
All you need - is just create segment set (9 models of each segment) and draw the level, 'till you are happy.
Plenty simple.
The Segmentor mk.1 free