I am ordering up some Hefty skids and was wondering besides the Radiator and Engine skid, do the rest get used much? As in how beat up your transmission and Gas Tank Skids? I have the Pro4x so I have some protection. I don't play in the rocks, but do find the belly low on these trucks even with the Lift. I figure the Gas tank skid is probably not an issue for me as plastic tanks move instead of dent.