I never said it worked perfectly, but it does work. DirtySouth's bike is just like I described, Five0 swingarm, ishock w/ reservoir and the preload tightened up, and it works very good. And actually turning in the preload is the same effect as a stiffer spring just not to the same degree. It is used to adjust the stiffness of a spring for riders of differnt weight, which is why springs have wieght ranges, as in the prload and stiffness can be dialed in for riders of varried wieght by simply using preload. So by turning in the preload, it will stiffen the spring up to acheive correct sag and stiffness or the shock. Quit trying to doubt my knowlege Five0, Ive been around bikes since I was 6, setup all my own stuff so I know what works, what doesnt, how to make it work and what works as a good substitue blah blah blah.