I think we need some more volunteers to work the website for the class. The PR group has already made significant improvements especially with the multiple languages, but there can always be done more.
With respect to sails. I think a good number of F16 boats sail with mixed sails. Most often the jib and mainsail are of the same maker and the spi is of another. But I haven't been able to find recurring theme in these mixed setups. Most Ashby sails owners have a spi from another as Ashby is/was not yet comfortable with selling a spi of his own design. However, all sailmakers have gone through a period of F16 sail development and results from the past may not have any bearing on what can be expected from future purchases.
From personal experience, the Landenberger spinnaker appears rather flat and with a straight leech, much more then my 2003 Goodall spi.
Wouter