We bought a MT585B Challenger that has some leaks on the cab suspension was not being used. We have couple other Mt575B Challengers with the same setup and have struggled some with the air tanks leaking and other leaks. Has anyone come up with a shock/spring combo that can be used in place of current shocks and just leave the air off. I know Agco did on update on the MT600 series doing this same thing but don't think they offer it in the size down frame. Has to be a better option out there that is simpler.