ok the prototype is working ok. minor changes in the mounting (coming soon) but as a consept it works even with only 27% infill on the part it is strong enough.

the length and hight adjustments will be taken care of in the next step (different mounting)

hopefully this will make the length long enough and the height compensation of 20mm by offset the two parts

once that is confirmed a second part is then going to be printed for monitor number 5 and probably with at least 60% or 100% infill

Stay tuned, just need to get some hardware (M10 bolts, nuts, washers and some metal sheets to make the connection between the two parts