PY is in my experience a complete lottery and in the mind of all of us who have "suffered" at the hands of a handicap committee, or been seen off by some apparent rating "bandit" designed to raise blood pressure and cause angst!
You must remember it's designed to be a performance handicapping system. It presupposes a perfect race sailed by the most competent crew.
Local handicaps cause so much trouble that no less than Cowes Week have abolished their LH classes this year and insist on all entrants rating IRC.I think they have done a deal with the RORC for an even simpler calculation than the normal.
Having sailed regattas for years under both systems I would suggest you get an Endorsed IRC rating, and forget the awful vagaries of local handicap.
If however there is no option then:
Make sure you make good starts-
Have the best sails you can afford-
Practice until your crew is really slick-
Know the Rules-
Keep your bottom clean and all your gear in tip-top order-
Then you will know that if you get your conditions, you make no mistakes, you have a modicum of luck--and you still finish down the pan--that its the handicap not you!!!