The spirit level indicates a very large error. Already there is room to put 2 bubbles between the two benchmarks but more then that I had made a horizontal line with a level Stanley I've realized that it was necessary to shift the bubble at one end to be right .. . Last it is not compatible with the Samsung F7000 series TV. And good luck to find the information. The ideal is to use the product selector on the Vogels. I ordered the Vogels Thin 205 instead.