Just fitted my harness and i was shocked to discover how loose all the screws and nuts were holding the seatbelt bits on. This made me check all the other screws and nuts holding other important things down and about half were in the same condition.
I would advise everyone (you probably do already) to check the seatbelt fixings and anything else important to see if its fixed down properly. If i had a crash with the seatbelt in that condition I would probably die!!!