Marco, I was boasting just the other week that I had used reflex bindings for around 11 years and never suffered an injury. The original set up I attached to a KD plate and I used this up until around July time this year with no problems except for the occasional premeture release normally at the bouy. When I fitted the carbon plate on it felt I could go to the next level, incidently I ski on a RS1, then one day it released on the wake. After inspection the boot was loose in the silveretta clip, so a clamped it down some more and had another set and second pass you guess it the clip releases again on the wake. Closer inspection reveled that due to screwing the plate onto the ski the plate rises between the screws causing a slight hump, as you said it slopes, but due to slight slope on the plate the silveretta clip is not square with the ski but sits at a very slight angle which I felt caused the clip to release prematurely. Itried to correct this by putting a thin plastic washer between ski and rear of the plate and to clamp the boot down more, it seemed to be working for a while but while skiing I would feel it click so I knew it was getting loose again, so I put some gaffer tape around the horse shoe and clamped it down some more, and the rest is history. I changed to hards sheels due to repeatedly having sprained ankle ligiments and have no intention to going back to rubber as I believe there are no completely safe bindings, we just run out of luck. I will definetly be putting the KD plate back on even if it is just for confidence. Read some of achilles blog, gives me a healing time scale.