I may stand corrected, but I am under the impression that the 'formula' classes F16 and F18 are manufacturer-driven classes, and as such my statement stands.
In any case @BoK, you say that your example has manufacturer sourced parts, however mixed round.
However, Rice's Viper F16, Pedersen's NACRA F18 and Smith's NACRA 20 all have custom sails. I suppose then the question is whether the Formula classes are manufacturer driven or not (except for the NACRA 20 which has no claim to 'formula' status).
As a scorer, then, I say this distinction should be made clear in light of my earlier statement in regards non-factory sails.