How can I create a surface from these curves?

Hi, how can I make a surface from these curves? I keep getting troubles in the middle section where the top curve meets with the bottom one.

Thank you in advance.

Sweep2?

Sweep2 will create an artifact in the junction where the bottom curve meets the top one.

Can you upload your file?

Yup. Here’s the file. Thank you for offering me help.MX Mouse.3dm (240.6 KB)

No worries! I have Rhino 6 though. It can’t open Rhino 7 files! :confused:

Yup. Hey I can make the surface now. Guess it’s important to place the curve appropriately.

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