I chose this model was because of the “Height”. I have noticed the power wires at the right-back corner, which means we would need more space to make sure the wires won't interfere with the platform leveling process.

And the stage I have added is to help you put the block in position easier. The stage should face down to push against the screw heads.

I printed with PETG @ 3-walls and 15% infill. Here is how they put in position before the platform leveing process.

The author remixed this model.
I didn't change the dimension of it.
I have added a stage to match the position for Q2.
I also did some polishing on the corners so you don't need to manually polish it after the printing. Since the elephant foot may effect the precision of the leveling.