Well, Dalek building seems to be somewhat addictive, so before I knew it, I was building again...
I learned quite a lot from building Bill, so Dirk's construction is somewhat different, though really only in detail.
The Belts, Slats and Neck are made essentially the same way, so I haven't said anything much new there.
Dirk is also built to the revised Guild plans, which have a slightly different geometry for the shoulders. The differences are very subtle though, and only visible to a trained eye (I can't tell!) It did mean that I had to make new belt templates, though!
Here are Bill and Dirk together in the TARDIS. Bill is on the left, Dirk on the right. As you can see, Dirk's eyepiece still needed painting when this picture was taken.