With a little bit of spare time, I was able to make a little more progress with my WTJ 1/1800 ships.
Magdeburg and Strassburg, and their masts. I am not certain of the diameter of the brass rod used for the masts, but the yards are made of 0.006" brass wire (the long piece in the pic above). Again, the mounting holes for the masts are printed into the WTJ cruisers, so just a bit of glue and in they go.
It is a different story with the TB's. Their masts are also made from the thin brass wire, but I had to use a drill bit to make a hole for them. I did not put yards on the masts for the TB's.
All of my 1/1800 ships now have their masts, although it is a bit hard to see from that angle. Primer will make it much easier to see - more pics after that!