How to design moving parts

[Grindeddown]

Personally I would prefer to print single properly toleranced items and assemble them as opposed to fudging tolerances so that something can turn.

Not answering the question but worth mentioning in this kind of thread.

i would imagine that this method would also have the benefit of leading to much more accurate prints. In some circumstances it should lead to better characteristics like tensile strength as well as you an much more easily optimize which axes to print each part on. As an example, filament on the XY axes are usually much stronger the on the z axis.