Ceiling Fan Cover Extention

Had some nasty imperfections around my ceiling fan in the bathroom. Could not find a oversized fan cover. So I created a extension for my existing one. Cover is 4mm thick with a 2mm groove for the ceiling fan cover to sit into.Designed in OnShape and split it up in OpenScad into 4 equal parts to be able to fit on a printer.Put x4 2mm thick depressions on the back so I could ad and glue locking piece. This connects all four pieces together.