lube the threads
What? Mounted over 100 different cartridges over the years, no lube. None magnetic screws, plactic washers, small screw provided by cartridge manufacturer (always manually).
when I lube the bearing.
Not every bearings must be lubricated.
Reading about lubrications some newbies on this forum can be confused, it’s not necessary to lubricate every moving parts in turntable!