I've seen about the custom steering arm plates (still don't know how made them) but I don't think it would make such a difference. On the 2021, the steering posts are waaay shorter than the 2020 version, so you can't have it go over the lower arms. If I abandon the new front knuckles for the 2020 version, I will probably use the 2020 configuration also, but with the new knuckles the bumpsteer setup is altered...

By the way it was more a theoretical question, as the car won't see a track until end of month :-(