You maybe found it but Brabham nr7 (i think) has no TUNING FFB setting. It was the first of the 2 Brabhams. The second one has FFB setting. With my DFGT there is a bit more FFB deadzone compared to ISI Brabham, and the cars might be a little too grippy? Its easier to break traction in the rear when coasting and steering compared to the F1 1975 mod where they have more grip. Of course i dont know which is the correct one as i never driven these cars in real life. Great mod and with a little tweaking will be even better.