I use an IMO and am currently tweaking it to 500hz.

I was wondering if top players who use MS mice are pumping up their polling rates or if they just run with standard 125hz?

I'm guessing that tournaments would be pretty strict on what you can and can't do as far as modifying their computers...

Do they let players hack things like polling rate and/or use acceleration fixes? If they DO, how many people actually bother going through all that trouble?