Plygem operator covers for a casement window

A quick learner from USa says:
I have part # 39-375 on a new window. Can I replace it with part # 39-376 fairly easily? The window is a PlyGem window. Thanks.
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Tom from SWISCO responded:
I'm a little confused. The 39-375 and 39-376 are the same kind of part, but they are used on opposite sides. A 39-376 cannot directly replace a 39-375. It would be like putting a passenger side car door on the driver side, for example.

Can you be more specific as to what you're trying to do? Why are you looking to replace a 39-375 with a 39-376?
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