After checking out Eric's buggy at the Haspin hill climb I finally took the plunge and added rear bags to my 100" wheelbase Warrior 4 seater. All I can say is WOW this rides nice and climbs well too.
I just finished up the bags last week and we had a Great time at Haspin this weekend.
Instead of using the Heim Joints with the plates that seem to bend easily, I just ground the outer splines off of the torsion bars and reinstalled the spring plates. I did add some support to the areas that see more stress now. This would have been much easier in a 2 seater but it still was not a bad job. I had a total cost of under $200 including air bags($90 shipped craigslist) limit straps, steel, bolts and air fittings.
This is definately the best improvement I have made to my buggy in the 10 yrs I have owned it.