In our RF18 install, after setting the platform above the furnace, there was enough room at the top of the fridge
just below the roof air vent and the aluminum roof framing to install an anti-tip block and rubber pad. This limits the in/out tilt
possible with chassis flexing. TDon't rely on tying the base of the fridge to he platfor only. This is the same approach used for large
counter depth fridge/freezer units such as Kitchen Aid, Viking and others. Ours, doesn't move.