Actually the '500 landing' number is correct, unless Bell has managed to change it. The other major thing is that the beams that run under the floor do not have a very long life either. That requires some pretty major work to change them. I don't remember the number, but I posted it a few months ago on this thread and I can't be bothered to look it up. Not to mention the weight that has to be moved around for CG reasons, unless that has been sorted out as well.
I have connections.........