Meanwhile, back at the build.....
The top of the folly will be wider than the rest of the tower. To achieve that I found a cardboard tube (from a roll of parcel tape) that fitted snugly over the Pringles tube. A circle of foamed PVC (Sintra or similar) was cut for the floor and glued in place inside the roll. A length of round balsa, cut to size and shape, was added to provide the basis for a small side tower with a door for access. The plastic card door has been engraved to simulate wood.

Larger blocks are needed for the expansion in diameter: A ring of blue foam was cut to form the basis of the blocks, which will then be cut into individual blocks (already marked out for consistency of size) before each is glued in place.
