With the last edge still selected (and this edge only) hit Ring to select all edges parallel to it. Deselect the edge in the middle. Select the small square near chamfer and enter 0.09 Chamfer Amount. Hit OK.
Exit Edit Geometry Mode. From the modifiers List select Shell and set the Outer Amount to 0.03. Go to the Modifiers List again and select Mesh Smooth and under Subdivision Amount set the Iterations to 2.
In the Front Viewport hold down Shift and Drag the band along the X axis to clone it. Repeat that a few times.
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