as was said, slide manufacturers say NOT to use such things.
those things are holdovers from the early days of slideouts, when the technology was somewhat new and there were issues.
those haven't been necessary for at least the last 10 years of RVs.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC