Hi, Joined today so this is my first post so I'm sorry in advance if I've done anything wrong! I've just past my test and got my first for which is a 2003 seat arosa 1.0s, it's already been lowered, 60mm at the rear but where I live these so many nasty speed bumps and it literally scrapes, so I bought some 40mm springs for a Lupo 1.0 1998-2004 as I've been told their parts are interchangeable, but when I went to fit them, they're a lot thinner than the current ones, so I was just wondering if that's okay and I should use them, or I need to buy some specifically for my Arosa 1.0s? Josh