Space Forum / Space Station / January 2008

I wonder if anyone could help me with some research.
I am a writer and I am currently working on a story that would take
place on a fictional space station that would be at the Sun-Earth
Liberation Point L5. Its purpose, as has been hypothesized by some, is

http://news.bbc.co.uk/2/hi/science/nature/7181390.stm
Europe's ATV space truck has been cleared for fuelling, to make it ready
for launch towards the end of February.
They can't confirm actual dates until NASA confirms the shuttle's launch

Just found myself wondering if there was any flat surface left on the
existing ring, say outside or inside the current bearing surface which has
been damaged. If there is, mite may be possible to design new bearings which
use this area and hence have a reasonable life before the ...