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I'm all in favor of Tonka Tough but if the Smitty is designed to take all the wear and tear you might just want to save money and weight on the sled and put it into beefing the Smitty. Just sayin'.
You could also just buy the wear bar kit for the jet sled, it will help extend the life. I've thought about a smitty sled for mine, but I have a height restriction with my tonneau cover on my truck so it wouldn't work.