1996 Fleetwood Prowler 33' 5th wheel...living room slide out. I want to put a support jack under this slide out since it's out all the time, but I don't know if I should put the support under the rails, or put the support above the rails where it would actually support the slide out floor. I just want to take some of the pressure off of the slide out so it's not so "bouncy". My support consists of a 2x6 and a scissor jack. Any recommendations greatly appreciated.