I guess the infill percentage does not matter much. Resolution is more important.
Maybe the axis hole has not the sufficient tolerance for some printers/filaments? I have prepared the STL file with looser hinges:
hole_radius = axis_radius + 0.3; // line 12 in .scad file
You might try to print collapsible_holder_v2_looser_hinges.stl if you think hinges are too tight.