Hi all, after digesting all of your tips, this alternative is what I came up with. The carabiners replace the blocks on the slack lines. I think I will need them because I'm a lousy housekeeper when it comes to sheets! I'll remember to use a sloppy bungee so as not to chafe through the bottom of the spinnaker! (and check for such wear on any second hand (H16-F16) Spi I might come across!)
The tack line is separate now to get more control in general sailing and for sailing "odd" angles. Could anyone comment on my cleat and tack line placement? Is this do-able or would it get in the way?
I didn't put the halyard cleat up the mast so I could get at it from any angle. That's important to me because I won't be sailing around the cans most of the time. With less friction from the tack line, I gather this should not be a problem.
I removed one set of ratchet blocks on the sheets and the bungees between them. I could always add those later if needed.
What do you say, did i nail it this time? ..>Or do I need to re-think some aspect?