Hi I’m hoping to fit some coilovers to my car later on however I’m not sure where to measure how much I’ve lowered it or where from etc. Also I take it that you can only adjust the coilovers when it’s jacked up with the wheel off? Lastly what’s a good height to sit at I’ve read that 60-40 is a popular choice. I don’t use my car everyday but getting over speed bumps would be nice. My cars a 1.6 cl. Thanks