Yes, matching sets, one on each side, sure do help! ;-)
I had a simple block, had no idea what it was, and I never even adjusted it, as I was too busy getting the reefing down fast!!! (ie: chicken) I would have started to adjust it this year, but then realized, when cleaning boat, one would not move, so it was on top of list this year. I had it initally set it for when headsail was furled to about 110, so I now realize I could have had a better sail set when the genny was all the way out to 135%, but hey, it either blows 30k here or 5k...and I am always more concerned when it is blowing 30k so just left them there for now! ;-)
“You get a boat for only one reason, because you want one. If you’re worried about being practical, forget boats.”