Scratching post giant washer

My cats have been so aggressive with their scratching post, that the rather weak chipboard tore and the top bed fell off.

15 minutes of designing and one hour printing later, my cats can sit in their favorite spot again which is now sturdier than ever.

This model is for a screw with a diameter of 10mm. I added another version for shorter screws, as the original takes quite some screw-space. 

Also added f3d files to make remixing easier.