I've always thought of chocks as being like line cutters only with slightly rounded edges. I find them dangerous. My boat is 32 years old, I've had her for 20. There is NO gel coat damage from using our bow & stern cleats in our slips or when traveling in all these years. Our cleats are in similar positions to those on a C310.doesn't have bow chocks installed. IMHO, those chocks are the must for the swing mooring, otherwise the lines going over the gunwales are sure to damage gel-coat. Please, chime in with your opinions, whether you have those chocks installed, and any other recommendations.