Makes sense. Super! Thanks!
Thanks to Sand Dollar also! I'm ready to go, thanks to you all.

Thanks Tom. Very helpful. I don't need the diagrams, but to clarify, 1) the end of the mainsheet is tied (can I use a shackle?) "to the deck eye aft of the swivel cam cleat" (quoting the manual). Right? 2) Then after following the path you explained, the sheet is anchored and adjusted at t...

I have a used Venture 21 (lines are 5/16) with no mainsheet or blocks for joining the aft end of the boom to the  port and starboard sides of the rear-cockpit. I do, however, have mounts in these three places to install hardware, if I knew what to buy. See attached diagram. I want something simple a...