Tested : - 450 c'est with PSS. car was more easy on curbs, but missing some entry steering - 1 screw motor mount : car was too tricky on quick change direction - 2mm shims shocks: same pace, different feeling, 4mm was better for me - 1.6 top deck : core more steering into corner, but too much aggressive into chicane Car have the pace for at least top 3, was 2 times on Tq, but crashed twice. If any question or suggestions, feel for to contact me