Has anybody (Wouter ?) got the inclination to do an experiment? Take 1000 (say) sets of results and score them all with Texel or ISAF and DPN. Compute something like the the percentage of competitors across all events at which the results are the same - it could be 0% (I would guess not) but if it's something like 10% then perhaps the effort that goes into maintaining DPN (and other national equivalents like UK PN) is wasted in a cat context.

Then take the ISAF or Texel formula and simplify it to a point where, similarly, the first 10% (say) of results are the same. Use that for cat racing. It may be that no simplifcation is possible... The simplification would need to be future-proofed; i.e. if it just so happened that the formula could be defined in terms of boat length, it would be dodgy to actually use that 'cos it could be manipulated, but surely we can dump board area and the like, especially since the formula has crew weight in it, which is always 75Kg regardless of the crew weight!!