@Hortoni find the dry land testing very valuable, it can show if the system works right. If it’s too easy or not, to release. But, the muscle strength of the legs don’t replicate the mass of the skier when falling down. I’m not very good at making it release on the dock, I have to try really hard. That being said, when I moved to the radar boot, it was impossible to make the system relaese at 4.5-5 that I had my reflex. I had to go down to 4 which sounds low, but radar cuff is much softer even though I use a lace and the Velcro strap and have zero movement inside the shell. @UWSkier I’m my experience, a lower DIN is needed on the radar boot, are you sure that everything is set up right? Mine sat perfectly on a size 10 reflex plate, but when I setup a size 11 on a radar plate , it wasn’t that easy. At first it had some play and I had to move to the forward hole on the bases… I would try a second release mechanism if you have one. Sometimes it’s what it takes to solve the problem, it might have an issue that is not visible.