Go back and edit the Swept feature, toggling ON the 'Preserve Shape' option. What this does is assures that NO approximation is done when the profile is used to sweep the solid. In other words, the corners are going to stay SHARP. Now you'll be able to create those blends on ALL the helical edges.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA Siemens PLM: UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.