We recently purchased a new Sabre 32rcts. After noticing the floor having excessive flexing, (10# dog jumping off the sofa almost spills my drink), I looked under the rig to find that the cross trusses were not in contact with the aluminum frame. I pointed this out to the dealer and he is installing wooden spacers between the trusses and frame to make it more rigid. There will still be the insulation between but now it will compressed. Dealer has been great and I hope this fixes the flex.