"George Adams" wrote

I have used FF and Cab -o- Sil side by side all this season, and see no
difference in performance betewwen the two.

I'd be interested in very specific ordering info ... where, part number,
listed additives, etc

I don't doubt that what you and Willi have works as well as FF, but I know
that just "fumed silica" isn't enough information to guarantee satisfaction

I'd like to try exactly what you are using and bet I'd be pleased.