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Caa311 said

The first time I lifted my f150 on my 7000 I didn’t get them parallel to each other and the truck fell off the lift to one side.. not real fast but just slowly went over. So I did some research and found out it’s critical to have them parallel. On the pinched cars it’s a piece of cake. Frame vehicles you need to pay attention. I just get the lift raised but not lifting and double check with a tape measure. Also learned that using it on the plastic floor tiles increases the risk if they are not aligned correctly but I have bare concrete so I can’t verify. They are cool but not sure I would buy them again. I think you could do the same thing with Jack stands for the most part. But that scares me to! I was taught to put the tires under the car when you pull them off as a fail safe and always have but you don’t have alot of space for that so I put my jack stands underneath on both ends of the lift. I don’t really think twice about going under the civic or mustang but I’m a little leary of the trucks but they are tall enough that the cars are more dangerous if they were to fall. Sorry to be so long winded.

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My initial use of the QJ was not a positive experience. As per the instructions stacking the rubber blocks to gain a few inches in lift did not end well with one of the QJ slipping under the vehicle after the vehicle was raised. This event occurred as I contemplated whether a jack stand would be prudent before going under the vehicle. Two floor jacks on one side was needed to lift one side of the vehicle to free the QJ. Either the QJ slipped on the concrete floor or the stacked rubber blocks moved or a combination effect. Costco (no longer sells the QJ ) recommended returning the QJ in case the frame was twisted. I had no further issues with the QJ to raise the vehicle using a single rubber block but I kept a jack stand with me while under the vehicle. IMO the QJ lifts and locks reliably but I’d prefer some type of adjustable bar between the two sides to prevent one or both of the sides from movement. Using any lift extensions from QJ would not be my preference.