r-frank wrote:One "technical" question ...
To save time/material would it make sense to add a pocket in the middle of each "flange" on the backside
or setting the filling degree to 80% or less when 3D-printing ?
I guess, but there are so many variables when dealing with 3d-printing that there is generally no one correct answer, kind of like it is with FreeCAD. It all depends on a lot of variables where some of them are:
What is the part to be used for
Material old, new, brand, type of plastic.
Printer how well does it print on different speeds, is it properly calibrated.
I guess I would rather sett innfill to some lower value rather than making a pocket if your concern is soly time and material. I used ABS 20% infill and 3 0,25 mm external layers and I can not brake the part with my hands if my life depended on it.