Hi all, newly registered but reading forum (this thread specially) since last year and I'm impressed with knowledge level I found here.
As I'm RK fan one sentence from Alan Permane makes me very happy.
The data was encouraging and it seems to be working as the wind tunnel and CFD predicted.
So I hope that their f-duct will also work in 'stage 1' as well as most updates in the future. IMO correlation of factory simulation and track results is a major factor in predicting the rest of the season. RF1 seems to be among the best in this terms.