about modeling method of counterbore hole on the bottom side —

Founded about modeling method of counterbore hole on the bottom side models & stl files for printing
Mars Station
ncaceres
Can Handle
Tony_G
Face Shield Visor
MaxVonWolf
Ledge Shelf
Colin Knowledge
House Stark Wolf
amboleos
Book Ring
alohapussycat
Micro CNC Side Clamps
CosmicNinja
Dragon Box V3
PrintNstuff