Are those struts for a cossie, or for a standard Sierra? The standard Sierra struts are a bit longer, which make the spring less tight in between the spring cups. I had those springs on Koni shocks for a standard Sierra and the springs were in a bit loose. At the time I put a hose around the spring end to make it fit a bit tighter on the strut. Later I changed to cossie 2wd shocks and then the springs were tight enough from the start.