I would like to take this opportunity to toss in my two cents worth since I have used every kind of tie down ever made in my 35 plus years of RV'ng.
When I purchased my current Arctic Fox the dealer used the Happijacks that attached to the front of the bed and the rear bumper. I started on a cross country trip and about 300 miles into the trip it dawned on me I could not safely haul a 5,000 plus slide in with that system.
I had seen some posts about Torklift frame tie down system on this site and while debating with my spouse about turning around and going back home, I called the Torklift factory in Auburn, WA who put me in contact with a dealer in Kalispell, MT that had a set of the Torklifts in stock. I had them installed and finished our cross country trip with no more problems of rocking and rolling and swaying back and forth.
The only problem that remained was loading and unloading the slide in since my truck is a 4 X 4 which required me to extend the jacks slightly past the redline which made for a real hairy situation. My wife would nearly have a nervous breakdown when we attempted it. She said to just leave it on the truck which we couldn't do since we also pull a fiver when not using the slide in and pulling the boat.
While sitting in a campground in MT. a couple pulled in a site behind me and I noticed a strange setup he was using that had pipes down the side of his rig. I figured I would go over and talk to him about it later.
I went into the camper to have my wife look at the system the fellow had, and by the time we got back outside he had the camper off the truck and was gone. I walked over to his site to look at it and got the phone number off the side and called the company to get a brochure. They did better than that and sent me a video of their system.
After watching the video I decided to buy his system. It took me two years to scrape up the money, but I had the "Stable Lift" system installed this past Oct. Now loading and unloading is a breeze, and my wife no longer has conniptions when I load and unload, and no longer have to bother with turnbuckles, chains etc and the rig is even more stable than it was with the Torklift.
Sorry about the long post, but I get a bit windy on the safety of something that makes hauling a slide in so much safer.
No I don't work for Stable Lift, but just an enthusiastic user of their system. It's something that's not for everyone, but it sure was for me.
Dewdo in the other Washington