IF you can place the entire frame on a solid foundation (like concrete blocks), you can block or support the slide. The problem with trying to support a slide separately is if the front or rear jacks settle and the slide supports do not settle, you will lift the slide relative to the rest of the unit. This can cause structural problems and/or leaks.
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot