if you need to do a 180 you should probably unzoom and then zoom back in, it's not really practical to keep the same "/360 with a zoomed in fov and expect to keep any kind of precision.

For consistency sake it makes sense to keep it somewhat proportional to the fov change so that aiming on something 2 inches to the right of your crosshair takes about the same mouse movement zoomed in or not zoomed in. I believe this is accomplished with the default zoom_sensitivity_ratio setting of 1.

Q1: Does lifting screw up your aim for a while/are you careful not to lift prior to matches? Probably less critical for demo but I always remember my shotty aim suffering post workout so I'd never do it before tfc matches.

Q2: Are there any 'big name' gamers from other games that you would like to come over to TF2 to challenge them?

I never got into the serious comp scene of tf2 but beating fatal1ty + top cs'ers team in the initial cevo tourney tickled me more than anything else. Phaser did you play that match with us? I'd like to think we helped him decide not to devote any additional time to TF2.