Extra strong wall mounting

Heyho :)This is part 1/3 of my DIY Canvas project.To make my projector screen as stable and "childproof" as possible, I stretched it onto a plywood panel (10 mm). I designed and printed various clamping and holding elements for this.Of course, this wall mount also works with other projects and impresses with its simple assembly and special stability.Stability:All parts are printed in such a way that even a weaker layer adhesion can be compensated.Use PETG or other tough material to get a long lasting and durable holder! (PLA could deofrm over time)Assembly:Up to 3 x M5 screws can be fixed in the wall for each large part.I have provided holes for up to 10 x M4 screws for the two other halves. (There are 2 Halves to get clean and strong prints without supports! Also you can adapt the tolerances a little later on).If you can use longer screws, you don't necessarily need to use all the holes. However, I only had M4 x 10 screws available for my thin wooden panel. However, the main force is