I am not officially on the road yet so my trips are about 1/2 mile to the corner store and back. I have an 818S, with power steering, 3.5degrees of caster, FFR wheels. As I accelerate the front end gets twitchy. It feels like one small move and the car will jump right off the road. I haven't had a chance to calibrate the speedo but would guess that this is happening over 35-40mph. I can get moderately high in 3rd gear before I need to slow down. I have seen the recommendation of 5-7 degrees of caster when using power steering. Might this take care of the issue or should I be looking at the power steering system? Now that I am thinking about it I should try driving at speed in 3rd gear then again in 5th gear to see if over pressure is a factor. Anyone else have this experience with or without PS?