There has been some concern expressed that by inserting slide supports under the slide that it prevents the slide from "giving" slightly and places unnecessary stress on the slide walls and floor. When there is weight on the slide from people sitting at the table or couch, the slide does flex ever so slightly. It is thought that by making the slide rigid by adding supports, that it does not allow this movement to take place and instead adds stress on the slide structure.
Personally, our slide does not move that much that I would consider adding supports. It seems to be quite stable and firm as is.
2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax