We have at our shop a 2001 Ford Focus Wagon that whn it is driving in rain tends to become very hard to handle and shoots both right and left and acts liek the rear of the vehicle is very out of alignment. We have aligned thsi vehicle multiple times with the most updated alignemtn specs we can get and we have our machine calibrated regularly the rear tires tend to wear on the inside edge and cup easily the tires ahev been repalced multiple timess the shocks are new. Customer normally has 50-75lbs of items in vehicle and has these in when we align it. On the few occasions the vehicle does get heavliy loaded such as 300-400 lbs the vheicle does act worse to handle gets jumpy and darts all over. Ive tried to get updated alignment specs from our local Ford dealers but their specs are older than ours.