First, at least for me, I never arthroscope someone's knee to "take a look".
The literature is pretty clear that operations performed without a clear
diagnosis are associated with a poor outcome.

Again, you might want to see another orthopedic surgeon and see whether the
pain indeed comes from your knee or possibly another source, such as your
back or hip. There are also other things like a neuroma or reflex
sympathetic dystrophy that can cause knee pain that an MRI or scope wouldn't
show. You can Google on these for more info.

These are just some ideas, of course, not specific recommendations. In my
experience it is rare for an individual to present with severe pain in the
absence of a discreet cause.

Back to the original thread, yesterday I humped around OSH with a big heavy
camera and a bunch of lenses- didn't see too many scooters. I was surprised
to see so many people leaving after the warbirds. Although the old planes
are interesting to watch, seeing them drone around doing chandelles gets
boring pretty quickly, even with the pyrotechnics.

On the other hand, seeing the skill of the top acro pilots is a different
story. Jim LeRoy did an especially excellent show- great presentation,
precise, and continuous action. Most people don't know how physically
difficult it is to do high level acro, let alone when it's unforgivingly
close to the ground. The flying skills that these pilots demonstrate and the
differences in their routines is much more appealing (to me) than watching
fly-bys.

Of course, that's why the Airventure is so appealing- it offers something
for every aviation enthusiast.