Installed gas struts to hold up the heavy wooden overhead doors above the bed in the 2016 CL21RBS. I know other folks have been able to use lighter weight spring struts with other door types, but those did not work for me. The 22.5lb gas struts worked great.
https://www.amazon.com/gp/product/B01AHHCHBK/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
(https://i.imgur.com/2p70XhNl.jpg)
Nice job! We have done something similar to that was well (used pre-packaged ones that we bought at the dealer and they quickly installed them). Really helps out a lot and holds them up nicely!