Let's take this one step further. If you have an iPad or iPhone there is a leveling app you can get. Clinometer version 4.1 from the App Store. This neat little app is a bubble level that speaks to you in degrees. Open up the app, place your device on the floor about where your axels would be. If you have Bluetooth in your TV you can pair it up with your device. Or use Bluetooth head phones. Pull forward or back up until you hear the app say "zero degrees" . Set your parking break and you will now be level side to side. This saves having someone else put a level on the side of the TT and giving hand signals when you are leveling. I prefer to do these things by myself and keep the DW out of the equation. But that's another thread. I don't have the levelers yet, but I have tested the app with my TV Bluetooth. It gets a good signal from the device.