Great job Star11girl! YT and a set of tools are your friend. I sat in the limited before buying my Sport just to check it out (was waiting for them to pull the Sport around and the limited was on the showroom floor) and I thought the seats were pretty stiff. Wasn't in it long enough to feel the lumber support, but I would have done the exact same thing you did, as living with that kind of discomfort for the next few years would have sucked big time!I removed the plastic lumbar piece! I was so nervous to do it but I watched a couple of videos on YouTube and pulled the seat apart. It made me nervous but I was even more nervous to drive a car for 5+ years with an uncomfortable seat. I am so proud of myself.