Suspension Geometry question, What cause a car to wander under heavy braking? Options

[nine14cats]

I have a question for the suspension gurus out there. I am experiencing some wandering in my car during heavy braking out of high speed sections into sharp corners. Visualize turn 7 at Sears, turn 14 (CCW) at Thunderhill, turn 2 at Laguna Seca. When I get on the brakes hard, the car wanders and "twitches" a bit. The car doesn't jump and it's not out of control, but it keeps you busy, busier than I'd like. I'd like to refine the car to not exhibit this trait.

My thought (and others) is that under heavy braking the front squats and the toe out becomes excessive, allowing the car to follow the undulations in the track pavement.

What are possible causes of this as the front suspension goes through it's travel?

One possibility could be linked to my front strut steering arms on my car. I have coil over RSR style struts with "custom" bends in the arms. The shop that built the car put a custom bend in the arms when they fabricated the raised spindle. Can a non uniform bend to the arms contribute to excessive toe out under hard braking?

Thanks,

Bill P.