thoughts on kingpin angle

[stanglou]

in reading chassis engineering by herb adams, i was interested in his claim that with excessive kingpin the tire tends to flop from side to side, and run up the edge of the tire as it is turned. I thought about it for a while and wondered how much of this logic applies to radial tires. if i am running a radial tire with a 9.4 inch section width is there an advantage or disadvantage to running a lot of kingpin. my design will probably be in the neighborhood of 10 degrees to get zero scrub. any thoughts?