Very well said Mark !
All our racing is on SCHRS handicap, even when we have 10 or more of one class. When we have a reasonable number of one design cats at an event, we give extra prizes (1st, 2nd & 3rd) to that class. At our Nationals, all classes start together. We have overall prizes, and prizes for fleets of 6 or more. This results in a great social circuit and no cat sailors feel left out at an event, no matter what class they sail.