extending slides in cold weather

Over the years we have had: worm-gear driven slides and hydraulic slides. We have ( over the last 25 years) used both in sub-zero F temperatures, with no problems! Maybe, we’ve just been lucky. We don’t hesitate to go camping (boondocking) when it’s cold. We plan on using our class c at or below zero...soon. A post-Christmas visit to see kids/grandkids and a few ice fishing trips. We researched our units prior to purchase, if they can’t handle below zero....we bought the wrong units.