Hello, I'm new to the sailing world so please bear with me. I have a new to me mac 22. I'm trying to figure out how to rig the mainsail boom. I know how to put the boom on and mainsail up. I do not know how to rig the sheets that control the boom. When I bought the boat it came with everything exept this rigging. I haven't been able to look at another mac 22 close up but it looks like there should be a double pulley on the end of the boom and then the sheets run to the pulleys on each corner of the stern? If anybody can explain this or post a picture I would really appreciate it.thanks,dh