Tutorial - Modeling cylinder head fins in SolidWorks?

Here is the tutorial.
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Step 1:
Top plane>>Sketch.
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Step 2:
Draw a square.
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Step 3:
Extrude it by draft outwards.
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Step 4:
Fillet the edges.
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Step 5:
Top plane>>Sketch.
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Step 6:
Convert the bottom face.
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Step 7:
Offset the edge. Delete the converted edge or make it construction.
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Step 8:
Top face>>Sketch.
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Step 9:
Convert the face.
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Step 10:
Offset the edge while making base construction.
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Step 11:
Lofted surface.
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Step 12:
Lofted surface between the sketches.
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Step 13:
Hide the surface.
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Step 14:
Right plane>>Sketch.
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Step 15:
Draw a line.
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Step 16:
Linear pattern it.
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Step 17:
Extrude surface it in both direction.
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Step 18:
While selecting surface-loft1 click trim surface.
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Step 19:
Now using surface loft as trimming tool trim away the outer surfaces.
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Step 20:
Thicken.
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Step 21:
Thicken the surface.
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Step 22:
Repeat the same step for other edges.
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Step 23:
Fillet all faces.
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Step 24:
We have the fins created.