Tutorial - Simulation of ball basic motion in SolidWorks Part -1?

Here is the tutorial on first part box of the model. We will go step by step from modeling to motion.
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Step 1:
Front plane >> Sketch.
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Step 2:
Draw a center point rectangle at origin of 300mmx200mm.
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Step 3:
Extrude it by 60mm.
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Step 4:
Click Shell tool under features tab.
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Step 5:
Remove the front face and offset distance be 5mm.
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Step 6:
Inner face >> Sketch.
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Step 7:
Draw a rectangle for cutway of the box.
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Step 8:
Extrude cut it throught the body in front direction.
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Step 9:
Now we have to create some features through which the balls have to pass Inner face >> Sketch.
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Step 10:
Draw a line.
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Step 11:
Exit the sketch. Now the front face of the wall >> Sketch.
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Step 12:
Draw another line. Exit the sketch.
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Step 13:
Under surfaces tab select lofted surface.
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Step 14:
Select both sketches.
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Step 15:
Thicken the surface with direction downwards so that it can merge with box.
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Step 16:
Inner face >> Sketch.
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Step 17:
Draw a spline.
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Step 18:
Extrude surface it up to the wall surface.
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Step 19:
Thicken it again so that it can merge with the box.
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Step 20:
Inner face of the box >> Sketch. Now draw a box like this.
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Step 21:
Extrude it up to the vertex and select the edge of the wall.
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Step 22:
Inner face >> Sketch.
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Step 23:
Draw a line.
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Step 24:
Extrude it with thin feature of 5mm upto the vertex and select the edge of the wall.
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Step 25:
The model is prepared. Now we have to apply the material.
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Step 26:
Right click the material and select cast alloy steel and our box is prepared.
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Step 27:
Here is second part. http://grabcad.com/questions/tutorial-simulation-of-ball-basic-motion-in-solidworks-part-2