Lofted Surface 
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Ruled Surface 
Use Ruled Surface, rather than
Extend Surface to maintain the
correct taper.
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Extend Surface 
To facilitate Trim Surface.
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Trim Surface , using Mutual
to remove material adjacent
to the horizontal ruled surface.
Knit Surface after trim.
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Create a plane, parallel to Top
Plane.
Sketch rectangle to create a
planar surface.
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Planar Surface 
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Trim Surface , using Standard
to trim below the planar surface.
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After trim, the planar surface is ready
as the basis for tooling split operation.
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