From the specs on the Accessories page, it looks like the Omnimount has 3" clearance from the wall and 90 degrees horizontal turn radius. The HTM-200 is 6.5" wide, so it's possible you could turn the 200 sideways. You might call Ascend to see what they say. If you need an additional 1/2-1" clearance, you could make some small mounting pads for the Omnimount out of MDF. You could radius the edges and prime/paint them to match your wall color. They would dissapear unless somebody was inspecting your work.