but I don't think I want to use them if they are toward their top height setting. I usually have double-back up when I am under the Z32 using the standard ZX jacks (I've been called a wimp for this by Forum members). I even place my ZX jacks (I have a few) under the side support positions to take up some of the load (keeps the car more level too...doors close better) when I have it on ramps.