yes yes, sail them a bit first, I like giving them a few days of training (if not a week), but that has more to do with making sure the cut is the same as the old (or if not, changing my mast to match the new cut).

Kites, yeah, first two days gets them to the right shape, after that you have about 10 minutes of a perfect kite, then they start degrading.... ;-) Or maybe that is just because of the force I put on it while pulling it down.....

As for my cap sails, never said they were free ;-)