Just thinking out loud here: Has anyone ever used a mechanical system for raising and lowering a vehicle? The adjusters on many torsion bar front ends come to mind as a basisfor the idea. The thinking would be to run a drive to this type of adjuster with limit switches for up & down positions. Typically these adjusters would be set without weight on the car, and the limitation of normal thread to transfer load, and issues around wear are the first things that come to mind. As well as additional turning effort to raise/lower with weight on. Running on acme style thread (although coarser pitch will require more turning effort) and keeping things well lubed are possible solutions. Just wondering what other downsides there might be? For me it would seem relatively simple to engineer, and I like the idea that a system failure wouldn't result in the same consequences as say, a blown airbag. Also the fact that air-ride type kits are spendy and hard to come by where I am helps. Running a similar threaded drive to a cantilevered coil spring mounts would also seem like an option.... Any ideas or experiences with this?