Something to consider: Only a couple of the views in the artwork file will work with the tilting. The others were designed for use WITHOUT it. Unfortunately, I couldn't find a one-size-fits-all layout that works in both modes. The attached version of the artwork file has the only marquee view that displays correctly on my system. If that doesn't help, I'm at a loss. Another thing to be careful of is that in the .ini file the screen chains are in the correct order (left, right, middle).
bgfx_screen_chains tx1left,tx1right,tx1center
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I have officially retired from sucking at everything I do. Life is much easier now.