MountainKowboy said - “Hahahaha armchair engineer who doesn't understand the design of the Happijac system. Been using it for over 20 years on 4 different TC's and 3 different trucks in all kinds of weather on and off road. The biggest problem with the system is people not using it correctly....educate yourself”
He’s right, I can back that up with the exact same experience. They do work fine.
Remember a lot of us were hauling campers before most of the modern gear was around. We used the clamp-on tiedowns, the Happijacs, and others.
Our campers stayed on and our trucks didn’t break.