Prusa I3 MK3S PSU Holder (LACK enclosure mod)

The new black PSU of the MK3S has a width of 106 mm, not 100 mm like the old one.
So the PSU holder of the lack enclosure doesn't fit anymore.
I've created a new one, similar to the original, but with a small knob to fix the PSU on the top.

I've used 30% infill and no support.