3: 2.5 to 6 minutes delta upwind is a lot, and so it's worth researching now that the horse is out of the stable.
Allow me to set the record straight, before anyone misunderstand me and think that that lead was caused ONLY be rerouting the spi halyard.
Alot more was tweaked on that boat then only the spi halyard and it was a club race. The skipper sailed well and his adjusted his rig the best in the changing conditions. It went from light to strong winds over the course of 2 heats and 7 laps. Most of gains were surely from sailing well and not making large mistakes. All this combined with his sailing skills (=good) caused the outcome.
In the second race the rest of the fleet got their acts together and the lead was shrunk to 2.5 min. This weekend we'll see the next installment and all the other boats will have had a few more sails as training down their belts.
So all is very preliminary although I really tried and simply could not hold on to him upwind. I could with respect to the others in the fleet. I would have loved to have his upwind performance.
Wouter