A great move to transition to our push-of-the-button home theater experience!!! If you already own the Original MantelMount(model # TM1A), the MM340 or the MM540, you will require a complete swap as the parts are not interchangeable with the MM815 and the installation math in the clearances are different.  For MM700 owners it's a bit easier. The MM700 and MM815 share the same wall plate and clearances.  This means that if you have your MM700 wall plate currently installed, you simply have to remove it from the wall and rotate it 180 degrees and essentially mount it upside down, allowing you to use the same mounting holes that you have already drilled into your wall.  In addition, the vertical braces, brace extenders and soundbar attachment are all compatible.  You will not have to remove those components from the back of your TV which makes for an easier installation. Regardless of which MantelMount you own, we highly recommend the MM815!