Hmmm..OK..I was just curious.
I only do one "race" per year in my boat, and it is a fun double-handed one. I use a 6 second credit here on the Chesapeake, but my boat hasn't had a real PHRF cert for 20+ years.
In reality, none of that matters much..6 seconds per mile is something like
2 boatlengths (too early to do the math)..
New sails, a clean relatively smooth bottom, not carrying 500 lbs. of junk on board and no bad crew work is really what wins the race.