Boundary Surface and Advanced Blending:The boundary surface builds the main body of the part. The edges of the tangency and draft helper are used for Direction 1 of the boundary surface. The surface is made tangent to both edges to ensure the correct draft at the parting line and for clean mirroring.
A surface extrude is used to form a portion of the arm. The sketch uses a spline that has been mirrored to ensure the arm is symmetrical. This can give better control over the shape instead of using a 3 point spline.
Download: Boundary Surface and Advanced Blending Complexity: Complex Features used: Mirror, Boundary Surface, Surface Fill
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