Wall mount for Brompton bike bag

This model resembles the shape of the mounting bracket at the front of the Brompton folding bikes. Screw it onto a wall, and you can hang your bag on it as you would on your bike.

My intended use is to take the bag off the mount in the morning, and put it back in the evening, including all its contents (in my case a laptop, bike lock, bottle with water). That is, it will be loaded and unloaded hundreds of times a year with some weight. I have therefore designed it to be sturdy, and to have a large area flush to the wall to ensure it won't be coming loose easily.

For further strength I printed it with an increased amount of perimeters (such that the back plate is solid plastic) out of PETG and used long screws to fix it on the wall.
Printing is possible without supports when you place it “right side up” onto the print bed.

Contrary to the mounting bracket on your bike, this model does not have an arresting clip holding the bag in place. This is not necessary with the bag hanging on the wall without moving.

Please feel free to modify my model - you can find it here on my onshape page.