c and d, thought all 2011 had air ride ,the way east coast rv advertises the supernova ,you would think so.they don't mention "early" or
'late" in their ad. again i will say the air ride works better on the smaller units , if you are only going to keep it another year ,it is not worth it! trust me, i went through it ,the 6400's are untamed beast's ,nothing will help. hate to take the wind out of your sail, just trying to help
