post cap owl perch

increased the wall thickness of the post cap to 10, added vertical cylinder (tinkercad), printed with petg

v1:
hole_height = 50;
inner_diameter = 60.5;
wall_thickness = 10;

I had one wonky fence post that was a bit larger

v2:
hole_height = 50;
inner_diameter = 61.4;
wall_thickness = 10;

og post cap + vertical cylinder = post cap owl perch