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The cav base is what, 1.5" x 0.8" = 1.2 sq. inches. The flying base is a bit bigger than a 25mm base, let's say diameter = 30mm. Radius = 15 mm or 0.6 inches. So flying base area is around 1.25 sq inches.
Sounds about right to me, as long as my estimates of those dimensions are correct.
Plus it makes more sense for something that shape to have a base the same rough shape.
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