Yeah - but we need to get out of this habit of thinking we can score spinnaker and non-spinnaker boats together in a distance race. It will never work out fairly because 50% spinnaker use (on which the rating is based) will hardly ever happen.
Yep! Keep em seperate! DPN is a POS and to put vastly dissimilar boats in the same group is pointless. IMO spin and non-spin are vastly dissimilar.
For every data point you can show me they are in the ballpark I can show 2 where they aren't even close.
If you want to run with the spin class put one on your 'A'. Brett Moss did it and is beating the living [censored] out of us down here.