Hi Dr- Question on the Berwind and the height of the seat - I put the chair up to what seems like it is the max height - but it is too low. I have a normal desk, and am 6'0 so I'd be surprised if it wouldn't go higher, but it appears it won't. Is there a way to extend the height. I moved that circular ring up on the thread as far as it would go-- it appears to stop at a notch. Or is there a trick I might be missing? thx! steve