Root cause: I am sure that even the cheap and nasty thing fitted would be ok IF the factory made sure that a D shaped hole was made that fitted the switch rather than a round hole .. i.e. its solid and cant turn pulling out wires in the process.
As to why others have dim lights, not so sure. My old TR was the same until converted to LED's.. and I recall the level of control was rather pathetic.. either on or off, not much in between.
