RV manufacturers warn AGAINST using slide supports and may void your warranty.
Slide supports are holdovers from the early days of slideouts, when the technology always still new.
Modern slideouts shouldn't need supports.
We had a slideout with kitchen and sofa in it and NEVER needed any supports nor did we ever have any issues in the 10 years we owned it.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package