Lets not forget about this F16 rule :

1.11.3 Racing with fewer sails than those named for each configuration is permitted.

The rule concerning "a single suit of sails" only disallows a racer using multiple sails during a regatta, as in using more then one mainsail, jib or spinnaker sail. Or at least that was the intention when we wrote the rules.

In my opinion you can have one stamped suit of sails in your trailor box and choose what the put on your boat or used during a regatta.

Note however that this still doesn't explicetly allow you to change from 1-up to 2-up or the other way around. That is a change in crew make-up.

Wouter