I have build a few smaller bits that fit together. It is easier to clean a small section than a large one IME. I followed the links directions basically. It works fine although when I scrub with a brush I pull off some of the grout sometimes. I used extra large rare earth magnets to hold it to the back wall and hold the sections together. The magnets were 1/8 x 1 inch round with a 30 lbs pull.
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