Prusa MK3 Printer frame brace replace PSU super version

This is another frame brace for Prusa i3 MK3 printer.
After the power supply is removed from the printer frame, we can put a frame brace in the position to make the frame stronger and less wobble.

1 Why I made this:
This design is for sure inspired by design 1: https://www.thingiverse.com/thing:2859884 and Design 2 https://www.thingiverse.com/thing:3512441
I am not 100% happy with both design so I decided to make my own design from scratch.

Design1 is for Prusa MK3 with silver PSU, which in top mount, it uses much more filament and print time for the frame brace, also in my opinion it's less strong since it's mounted on top.

Design2 is for Prusa MK3 with black PSU, which is side mount, it should be perfect, it uses less filament, it's strong, only thing I am not happy is the bottom two holes, the design make the hole too long too large, so it seems less strong and could easily move a bit, so it defeats the frame brace' purpose.

So I decided to make my own design.
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