I've been a front (linked) brake-only rider for a very long time and just discovered that pressing my rear pedal MASSIVELY increases braking on my LC GSA.So much so that I rather like it. Why? Shouldn't happen in a linked system? I'm wondering if I have a problem and I certainly had a fluid problem a year ago when the rear reservoir was very very low and was corrected at service. (My first GS was a servo model, so they've all been different )