I recently purchased a 2017 Titan Pro-4x and installed a 1.5 inch level kit and more aggressive tires. With the new rubber I got the tire shop to perform a wheel alignment. Upon picking up my truck the tech advised that they were able to get the toe and camber within spec but were unable to get the caster within spec. The steering now feels a little twitchy. Should I be concerned with the caster being slightly out of spec and if so any recommendations on how to address it?