First, place the plate inside the box, then set the fin on top and secure it with bolts.
This one thing will change the flow of things. First, attach the Magic Screw to the fin.
When doing so, do not tighten it all the way, but leave a gap of a few millimeters.
(Photo 3) Next, put it in the box with the plate still facing straight.
(Photo 4) Check that the plate is in the groove of the box, then turn the screw. The plate will rotate and stop at an angle. Tighten the screw all the way to secure the fin in place.
(Photo 5) On the other hand, when you loosen it, the protrusion on the plate catches on the box, and the plate stays in a straight position, so the fin can be easily removed.
It is a very simple but very useful idea. It is made of stainless steel, so it will not rust.
