Dimensions have changed slightly since this house was built. I pulled out the old cabinet, tried to fit the new one, and the builders had not squared off the opening. I only needed a sliver of space. Needs must? Take a hammer, and dent the shit out of the wood crosspiece. It would have been easier if I hadn’t just done bicep curls and shoulder work right before (not expecting this ill fit). About fifteen minutes of energetic impact … and a bit of swearing loudly … and it slid right into place.