Some people just don't get they bought an RV and it will not be just like their stick house. I'd loose those jacks under the slides in a heartbeat ... any major settling or say a tire looses pressure ... trouble follows.
This unit has 13-14 Jacks under it and they were having MORE Installed! Youroo!!
I just could Not help myself when I saw all the Jacks,I told him he should also add jack supports under his Steps because of the Leverage caused by 3 steps Rocking the RV when Entering the Door! Guess what he added! Youroo!!
I like those stabilizer arms that attach to the frame at one end and to the base of the stabilizer jack (screw type scissor jacks). They deploy easily by loosening one bolt and retighten when jacks are extended. I only use one per jack but if you are truly obsessed you can add two per jack. For my trailers just one per jack on two of my 4 jacks makes a heck of a difference with stability and makes a lot more sense engineering wise and is simple to use. I also use an x jack between the wheels, especially for the side that is up on leveling blocks. wheel blocks don't work as well for wheels that are up in the air and it kind of locks that axle from rocking back and forth (but it does not keep the trailer from bouncing up and down on the springs.). So unless you set your trailer in concrete up to the rails there will always be some movement. FYI, I found the stabilizing arms on ebay cheaper than retailers....Good luck and have fun....Walt