Doorstop

I need my door to stay half open so the robot vaccuum can to to both rooms and do its job. I want to do it with the smalles footprint. Previously i used a doorstop from the Action (https://www.action.com/nl-nl/p/3012451/deurstopper/ €2 ) and something heavy. 

I designed a stop that takes the stop from the action as a weight and keeps the door open.

To protect the paintwork I also added self adhesive protection pads (also from the Action store, €1)