So, there I was, sitting in my basement looking at a big pile of Blue Board and giving my trusty Proxxon hot wire cutter the side-eye. I had some time to burn and no particular plans. So I decided to try a little free-hand cutting.
Then this happened.
not too bad for free hand work
the bastions came out evenly, if needing some sanding
sloppy draftsmanship didn't help
and the fact that the whole thing is less than four inches across didn't help at all either!
I am slowly working up the nerve for a 28mm version, just you wait!