You're absolutely right! We've been thinking very similar ways about "dipole" components and how to best do this; and I think you've nailed it. What about using

You're absolutely right! We've been thinking very similar ways about "dipole" components and how to best do this; and I think you've nailed it. What about using dunder __in__ and __out__ attributes? Easy enough to implement for us and overload for folks in the future.