[MDTdriver]

I have the jacks, but my thoughts are, high price 5er have better frams for slide outs, for fulltime use. The low to mid price 5er's are not all for fulltime use. So slide outs are made for vacation use. So maybe they need some help for extend use.
This is how we use our 5er, mid price MFG say not for fulltime but we used the warranty and no problem for fixing items.
I do use my jacks, if we stay extened time and are on very solid ground.
This week I will start working in a camp ground and staying on gravel site.
I will use them and check every few weeks for movement. I have three pairs of scissor jacks plus landing jacks with JT stablizers bars on six jacks.
So you decide what works for you.

Larry & Kathy