I am the 3rd owner of an Ericson 27 with a Mariner (who went out of business) Roller-Stay Furling System. One of the bearings in the Halyard Swivel, 200 series, needs to be replaced. Does anyone have knowledge of how to remove the bearings and what size bearings to purchase? I can most likely figure the proper size once I have the old bearings removed if I don't destroy them. Thanks in advance for your helpful response.