38x20mm Rail Extension +15cm

I designed an extension for my monitor arm, because the middle monitor was so big that the left and right screen had to be upright format but i wanted to use it in horizontal format.

it fits into a 38x20mm rail with 2mm wall thickess.
The inside measurings are 34x16.8mm
I had to hone it down a little bit (not even a half mm), but i wanted it to fit in hard that it won´t wobble.

Designed in AutoCAD, printed on FLSUN Cube with Simplify3D, with 20% infill. i think a little bit more infill w