Bahaha! But seriously, 4cm is nothing bro. Look at Orrock, he is able to 4' lowered to the ground, only 1cm to go for the rear, so the rear is 11.5cm lowered then eh? But ey, 40mm is trouble free, that's all I'm sayin'. Besides, standard height or non-standard height, you still need to be carefull anyway. Wanna know about my day-to-day? pretty much like when it was std actually. However, the best is to ensure can your car get out from your house easily.