Agree with above Post , thats why I bought Backyard Buddy's after bumping into my friends 4 post Rotary Challenger Lifts with a heavy 59 Dodge on it . He started Screaming at me because he thought it was going to fall over onto his next lift with another 60F 300 on it . Made in China and flopped around like it was on springs with the cars in the Air ! But I said Yours is ALI certified ! I said I wouldn't put a VW Beetle on this Chinese ALI certified Lift , and called Backyard Buddy ! ALI Certified or not , My USA with USA Steel Lifts don't move , Especially the Monster 9,000 Pound Backyard Buddy Lift with My VANZILLA on it !