To raise the car with the Jic Suspension on a teg you would tighten the fittings so it would squeeze the spring correct? The fitting that is the lowest, is that adjustable or is it just a lock?

 

its adjustable without squeezing the spring. the lower lock loosens and the perch rises and lowers, its threaded. you can adjust the front easilly and the rears are a little harder. but in no way are they all too hard to do. you should never have to adjust the pre tension.