Indeed, the yellow wheels I bought in a German bricklinkshop. I've got them also in green, blue, tan and white (not to brag or anything
These red peaks were in the pick a brick boxes in toy stores a few years ago in The Netherlands/Belgium. Some people might remember that.
I had to buy the steep slopes though.
It's sad the steep corner slopes in black are so expensive, I like black roofs too
It's not that I live in a medieval village by the way, but there are plenty of old buildings in the neighbourhood. Germany is not that far from where I live, and of course that is castle walhalla