Levelling with Scissor Jacks

I don't mean to feed the flame war here but...I recently added the larger scissors jacks to my 5er. and BAL cleaarly states that they are not to be used to jack up the trailer. I had a scissors jack collapse on me on my Cougar TT a few years ago. I agree with the above posters that say they allow too much lateral movement to be safely used to jack the entire unit up. The Bigfoot and Lippert jacking systems may be utilizing the same points on the frame to level the unit but their design is different and their attachment is such that they do not rock as much. The reason so many of us put Steadyfast or JT Strongarm stabilizer bars on our rigs is because of the movement allowed by the scissors jacks. Auto levelers don't need them because of their inhehent design. This is just my opinion but is one born of 40+ yrs of experience.YMMV