I think I'll try the tapping route. The former SHOULD snug up tight, but if that fails, I still have the option to drill it over size, and put a grub screw in.I think you.may be better just drilling it over size and the cross drilling and using a grub screw. That way the forces when using it are not just on the threads. That said if it is just for leather work ect tapping it should be fine