My unit has a set of air bags from the factory that I didn't know were there. I purchased it used and also thought it rode roughish over some roads. I found the air valves one day in the cabinet on the drivers side in front of the wheels stuck in a corner that was hard to see. I put a air gauge on them and found zero reading. Put 40 lbs of air in and went for a ride, what a difference. Added another 5 lbs and drove it again, even better. So since your unit has no air i would suggest a set of air shocks to soften the ride.