For this I tried setting a goal of: spending no more than 30 minutes on doing the finishing touches.
I ended up spending about an hour and a half instead 
.
While making the towers I actually made the mistake of subdividing prior to doing the windows. So the mesh became a bit too messy to work with. Pretty much like the course described. I knew I dungoofed when it happened, it simply didn’t cross my mind while building it.
A good lesson!
