I had a quiet weekend so was able to put some time into the build.
The side frame jig enabled me to make two matching side frames in about an hour.
When the white PVA glue dried I drilled each joint with a 1.2mm drill in a pin vice.
Then I used the Dremel with a 2mm drill to drill through.
I had to do a few repairs with superglue as some of the joints separated during drilling.
I used cocktail sticks as dowels, held with PVA.
Once dry I used side cutters and an emery board to remove the extra cocktail stick.
I now have two strong and almost identical side frames.

Once the sides were made I made the three floors using coffee stirrers.
I clamped about 20 coffee stirrers at a time into the Proxxon drill vice and then sawed them to 60mm long.
After a few minutes, I had 60 x 60mm planks.
The floors only took only a few minutes.

I made a simple roof and bridge and clad one side with planks.
This also only took a few minutes but gave me the shapes and sizes for the next part.

Today, I started to work out the drawbridge, the roof and the front armour.
It is starting to take shape but a lot of things are not quite right and most of it will need to be done again.