Trying to do the Getting Started with Rhino - Retro Radio

Why is BlendEdge giving me a different result from one side of the radio to the other?

ThanksBlendEdgeConsistancy.3dm (555.2 KB)

Probably because the blend surfaces are between trimmed edges. When using BlendSrf it is best to work with untrimmed edges if possible.

To convert the trimmed surfaces to untrimmed surfaces:
Split using the Isocurve option
Shrink (can be done as part of Split using Shrink=Yes)

Use BlendSrf after converting to untrimmed surfaces