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Selecting the correct edges for the Blends can be hard. 

For the first blend, you need to select the circular edges around the nozzle; the ones right at the corner from the nozzle itself and the flange.

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For the second blend, you need to select the bottom edges inside the groove. In the picture below you can see them highlighted, but note that to ease the understanding, a "sliced" geometry is shown. Your geometry will get like this by the end of the above video!

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Specifying the Contact Regions

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