Butterfly valve key

The original design is very good, but the slots were too narrow for my valve. The author generously attached a step, and it would have been right for me to edit it, but I decided to practice my design and did everything from scratch. The protruding parts have become thinner, so the use of M3 bolts is now highly recommended. I also reduced the overhang at the bottom - my printer didn't print very well the way it was done in the original.