Hi guys, I am pretty new to the Oakley world. I received a pair of Oakley Flak Jacket XLJ (jet black with black iridium lenses) as a tee prize at a golf scramble. I really love the fit of these glasses, but I am not a big fan of how the lenses look. My XLJ's have the lenses that have the curve at the bottom of the lense. I like the more traditional lenses like on the Flak Jackets. My question is are the lenses on the Flak Jacket interchangeable with the XLJ? I really don't have any idea what I am talking about, so any info would be greatly appreciated. Thanks!