JJBirrish is one of those members that I always see very good, solid advice coming from. I consider him pretty close to an expert on here as he always replies with facts and logic.
I have not seen him ever flame anyone here, and he didn't flame the OP. Saying what he did was stupid (or silly to be exact) isn't the same as calling the OP stupid.
Well that makes me feel much better. :R
First, he doesn't know what type frame the jacks are used on whether it is a 10" single frame or twin 16" frames so how does he "know" what will happen?
Second, the frame is jacked by 7k plus jacks more than enough to lift the frame safely.
Third, it usually takes under 3" to level a side far from lifting the wheels off the ground or far enough to "bend" a frame.
I see so much BS on forums that new RVers take as truth and it's just not right. Everyday people get the Bigfoot system installed on their 5th wheels and believe me the system is installed on the frame. The only difference between the Bigfoot system is the auto lift function because each of those jacks are just 3,500 lb jacks half the specs of a 7k scissor jack.
I installed the scissor 7,500 lb jacks on my unit and they work very well thank you without any frame bending. Unless your friend JJBirrish is an engineer for RV frames then he should express his "opinions" as opinions and not fact.
The people who installed them and use them have much more information than someone who saw his friends trailer malfunction with stock jacks.