Thanks for the replies. Yes, I usually run fairly neutral set up and adjust from there. I have someone that is a very good driver and mechanic and he helps a lot with my set ups and adjustments
I kind of like the tony more for me, as it seems that the neutral set up has a much broader performance curve, while the birel for me seems a little more sensitive and I don’t have access to someone that knows set ups for birel like I do with otk.
My brother just got a 2015 401 and I have the 2013 evrr and was hoping we could share data and set up info but it sounds like the chassis and wheels are slightly different. Hopefully not different enough to effect it much.