Behsen: I have seen in an old thread (4 years old) -
that back then Martin Dillen was able to help - but it looks like he's
now a former member now.
No he's not - you'll just need to send him a PM
He
can also get you the correct belts and I strongly suggest you get the
whole guaranteed correct bunch from him; it'll save you a lot of
trouble. It'll be the same amount of work again to replace the next
failing belt and they'll all be bad by now.
There are two slightly different mechanisms that were used in 7000s; Martin will help you with that as well.
EDIT: regarding the job itself, 7000 is essentially the same as 6500 but the service manuals aren't too helpful with the process. It's a rather straightforward job, but you will have to think before doing. And don't crack the main circuit board!