Well-you've used it -so you can tell us if it works or not.
But if you are welcoming critique (
) , your designer/fabricator must have been a bridge builder!
I'm guessing the rack alone is over 500 lbs? You could park a train on that. I build tube chassis race cars + roll cages-if you told me "build something to hold a 500 lb sled + 100 lbs of gear" i'd bet I could make something that weighs 1/4 of that.
A hard lesson learned: something has got to give. 1st learned by me at a young age. I had a Datsun 510 wagon-build up for hammering down dirt roads-pretending I was a rally driver. I had a piece of 3" pipe given to me. I thought it looked tough so i made a front bumper out of it. One nite out beating around, I blew a corner + went into the large rock with the right front. The bumper never bent-but the car was destroyed. The energy went from the bumper into the mounts-and the to the shell of the car-which was nowheres as strong.
With that thought in mind-what do you think it stronger, your deck or the Chevy its mounted to?