What if the fixture is the wrong size? Can I return it? May 10, 2019 19:21 Standard fixtures can be returned for exchange or refund if they have been unused. A restocking fee may apply. For more detail about our returns policy click here. Related articles What is the delivery time for an Assembly Fixture or other tools? Modelers have building switches by hand for years. Why do we suddenly need an Assembly Fixture to do this? How heavy are these fixtures? What will it cost to have them shipped? Building Turnouts Using Fast Tracks Assembly Fixtures. Do you offer Assembly Fixtures for G scale?