Hey everybody, I just put my new to me sirius 21(1978) in the water today. There was some block and tackle on the boat that I assumed was for the main sheet. Upon closer inspection, not so. So we rigged up a line through a shackle hooked to the end of the boom and then lead back to the transom mounted pulley/cam cleat. We had to sail her from the boat ramp to the marina slip (engine wouldn't start-another story) and it worked ok, but I am interested in setting up a proper system. Does anyone have any drawings or info on the best block to attach to the boom. I googled some pics but couldn't make out details. It appears the boat uses a "V" type apron before leading the sheet to the cleat. Does anyone use a simpler set up? Any info would be great. Thanks Chris