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Problem with Rail Revolve - Modelling a Computer Mouse


New member
Hello, new to Rhino and to the forum.

I've been trying to model a standard computer mouse. What I've tried so far is to do a rail revolve to get the basic shape. I've created a profile curve in the front view and a rail curve in the top view being the outlines of the mouse being viewed from the top. I select rail revolve, select the profile curve, select the rail curve but then when I am asked to choose the start and the end of the railrevolve axis - see screenshot. How do I know where I want the axis to start and finish? I've tried to pick points at the curves but then I either get error messages or I don't get the shape I want. How can I get the rail revolve to work?

Is there an easier way to model a mouse, that doesn't involve a rail revolve?

Help much appreciated.