Having been looking recently at steering geometry for our latest project, I've been looking into running a 0° steering axis inclination (kingpin angle viewed from the front of the cast). It results in a scrub radius of ~85mm, but it does greatly simplify construction, reduce cost and takes up little space given that space for the steering mech is very limited
From what I can see the downsides of such a large scrub radius are possible brake steer if braking is unbalanced and kickback when going over bumps. I expect a damper can be used to alleviate the latter.
Status Quo has a SAI of 16° and scrub radius 15mm, and is easy for even our youngest drivers to handle. Have any other teams experience with running fast cars at large scrub radii? Most of the internet advice relates to road cars only.