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    Michael says the 7.05e-31 is “0”.  It seems any small number is considered as a “0”. 90 or 180 get calculated as whole numbers however.

    It seems the “ideal” Hybrid is not a “symmetrical” model. There is only one port that can be used as the Input or Sum. I can only get your data if I place the Hybrid as shown in your schematic. It would be useful to identify this port on the schematic symbol. I assume this is why you had problems making your amplifier to work.

    Attached is two alternate schematics using Hybrid 90/180 where the data is wrong.