Ive read in a few threads that the diff rivets are a weak spot in th 020 and 02a boxes.... whereabouts are they, obviously on the diff, duh, but do they hold the ring gear on the outside of the diff, or the planet gears to the outputs or what- got a proper gti box to replace the nasty diesel box im running at the moment (old gti one spat its dummy out after santa pod, oops!) and i thought i might aswell have a go at servicing it and bolt or dowel wherever the weak point is if possible.