I had that issue after I installed stainless brake lines, turns out I had a small leak in one of my back brake lines where it connected to the hard lines. I didn't discover it until the brake fluid low light came on, right as I was about to start my autocross runs at Daytona. That was just me, when I was searching the "brake pedal lowering" issue I seemed like I saw a lot of Cayman folks had it, but I stopped searching once I resolved my particular issue.
Steve
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