Screw holes for self-tapping screws

[thegoodguy]

I do this a lot - it's all about the perimeters. Slicers apply perimeters to the shell of a model but also put them round any holes/voids in the model.

so with three perimetyers on a 0.4mm nozzle - you will automatically get 1.2 mm of solid plastic on the outside of any screw holes.
Absolutely no need to use a lot of infill.

Thanks.

I solved my problem by adding two 2mm-wall tubes as a separate entity into Prusaslice, and setting them to print with a 2mm shell. I'm not sure that it's a textbook solution, but it worked.

Printed perfectly .

Thanks for all the input.