I thought I read about somebody that was able to price match at performance and use the 20% off coupon on top of that!!! Is this possible?

I'm going to be placing a order for a complete ultegra groupo mon or tues (to convert old broken 12 speed into something nice), so I am hoping to maximize my savings.

I'm still going to save a lot even if I can't price match, but it would be nice to save even more...

I know there is a site that will give a 3% rebate on top of performance 20% off.