This is a very entertaining hobby to have. Wishing you a lot of fun.
Next stop, making sundials and reading astrolabe.
I was so surprised to know that Chaucer had such interest in the workings of an Astrolabe. It's not much of a surprise if you think that Astrolabe were the pocket GPS, pocket watch, pocket star chart of those times.
Honestly I've been thinking about putting some standing stones in my yard to act as solar clock and calendar, maybe doing a lunar calendar as well...
I don't that's against code (yet).