It may have taken some time to do it, but now the silo is finally finished.
It’s been great fun building it, and a learning experience. The shed was made of some sort of house from a craft store, with the intention to save me some time. With the protocol in hand, I can see that scratchbuilding it like I wanted it would have taken less time because of the tough material it was made of. Balsa wood or foamboard would have been a better idea. Here are some more pictures from different angles: