Dynafit has an available OEM “rotation lock,” “anti twist” part you can install on your Radical series bindings to prevent counter-clockwise rotation (“auto rotaton”) when the heel unit is in the climbing position. Click the following “read more” link to view a how-to image from Dynafit, or you can download a PDF here. The item is part number 48684 and can be obtained from Salewa North America
WildSnow.com publisher emeritus and founder Lou (Louis Dawson) has a 50+ years career in climbing, backcountry skiing and ski mountaineering. He was the first person in history to ski down all 54 Colorado 14,000-foot peaks, has authored numerous books about about backcountry skiing, and has skied from the summit of Denali in Alaska, North America’s highest mountain. For more about Lou, please see his personal website at https://www.loudawson.com/ (Blogger stats: 5 foot 10 inches (178 cm) tall, 160 lbs (72574.8 grams).