Bobby,
These arms very well could be 20 years old. I trust your voice of experience on this one, thanks.
Jim
You have a good point about how little the left front is contributing except during braking on turn-in, and then I would be concerned what the effect of exponentially increasing ackerman would be as the steering input transitions from left on turn-in to right as the tail comes out. Possibly negligible since the brakes should be off and the left front would also be unloading, but it sure could complicate things.
If I ever get the opportunity to run multiple laps on an empty track it might be fun to experiment with it but I think I'd better leave well enough alone for upcoming race days.