My first multipart. Made from a one inch board using a jigsaw. If I can remember from 20 plus years ago, the blade was set at a 20 degree angle. The bottom board as well as the umbrella are solid, the layers in between are cutout leaving an inch and a half wall thickness. The bottom two boards are hinged together - it just tilts to the side for its' annual cleaning. All the remaining layers are screwed together. We have tree swallows here every year. They eat mosquitoes and that is a good thing.