Tutorial - Modeling Flywheel in SolidWorks?

Here is the tutorial.
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Step 1:
Front plane >> sketch.
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Step 2:
Draw this profile.
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Step 3:
Revolve it.
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Step 4:
Now we have the circular base.
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Step 5:
Top plane >> Sketch.
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Step 6:
Draw this profile.
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Step 7:
Extrude it from offset at 38mm to up to body.
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Step 8:
Create a axis about the origin and the top plane.
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Step 9:
Fillet the fin by 5mm.
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Step 10:
Circular pattern.
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Step 11:
Select the boss-extrude & fillet as the feature to pattern about the axis1 16 times.
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Step 12:
Top plane>>Sketch.
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Step 13:
Draw 4 circles at P.C.D 61mm of 8mm dia.
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Step 14:
Extrude them from offset 18mm to up to body.
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Step 15:
Top plane>>Sketch.
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Step 16:
Draw 4 circles of 4mm dia concentric to the previous extrusions.
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Step 17:
Extruded cut by through all.
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Step 18:
We have the flywheel body.