Just one comment about long knots on Spinnakers.. I assume this is in reference to an A sail. While few symmetrical spins are tied on, if they are then long knots are problematic when acting as a guy vis-a-vis the pole. The tack/clew should be as close to the pole as possible for stability.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)