Server game, Tim Tebow: eTags off?

I’m trying to squeeze the last little bits of perf from a site - the ones within my control, and I’m coming to the point where I have to manipulate my eTags.

Looks as though I should be turning them off. Has anyone fiddled with this much?? I have a great Yslow perf score and want to see show close I can make it to 100%.

<FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)(\.gz)?$">
Header unset ETag
FileETag None

Thx for any insight.