Air Hoppin spring idea

Don't know if it has been done or if it can be done but this would be cool for an Air Hopper. What if you used Hydraulic springs in the setup. The only thing I can't figure out is how to mount the spring to the upper plate. Or it may be better to mount it to the bottom and use an upper cup and lower plate. Any ideas? The front would have to be a short spring and the rear could probably use a full spring. Just trying to think of a way to make this work.