Woodpecker Squares Mounting Bracket

I'm new to 3D model design.  This is my first upload.  I designed this myself in Fusion360.

This is a bracket intended to mount/display my collection of Woodpecker's Aluminum Squares.  Their most popular ‘1281’ square, and their smaller squares, the 851, 641, and the Mini Square.  I printed my model in PLA and I rotated the model 45 degrees to reduce supports.

I was inspired by WERDART's ‘Woodpeckers Multi Sq Wall Sleeve Mount’.  While he has 3 different types of squares, I'm using only the aluminum squares.  I also added the names of the squares, so you can see what is missing.

After several iterations that I was unhappy with, I finally decided I could reduce the depth of the whole print by not mounting the Mini Square like the others, and instead ‘push’ it in through the model. That saved print time, filament, and small overall footprint.

However, I think that because I used PLA, and my printer got too hot, there is a line where several of the bottom layers ‘squished’ under the weight of the model.  Because I care more for function in this instance, I'll see how it works in my garage in PLA, and reprint if it doesn't last.

I also edited the model AFTER printing because I messed the screw hole design up, so I edited the holes to add more material around them for strength. But for me I used FastCap screws with their larger powerhead.

I ended up hanging it at a angle because the PLA is very slippery.  The wall may vibrate the squares off.  If I redid it, I'd create another lip where the notches are in the squares.

I'm aware of Gridfinity, HoneyComb, and Multiboard.  If was I was better with 3D Modeling, I would have tried building these models to accomodate one or all of those systems, but maybe one of you guys can?!?