I’m having trouble pushing from two different directions when they cross each other. The attached skp file is a knob for the Z shaft on my 3D printer. The slot in the top is for a nut and the hole in the front is for the screw. How can I make the screw hole go all the way through to the shaft and have the slot push down 13mm and keep it free of residual “tunnels” or blocked holes?
Turn off hidden geometry,
right click tube, choose intersect with model.
left click tube and hit delete
left click two faces in holes and hit delete, turn on hidden geometry
swing around to face in center hole, click face and hit delete.