Hubble residuals vs. true simulated x₁ values for four simulation variations in both Y-band and H-band. When simulating these samples we toggle two components, α and the M₁ model surface, on and off in each row and observe the effect on Y-band fits in the left panels and H-band fits in the right panels fixing x₁ and c to zero. We fit the SN LCs the same way in all panels. Lines in red are fit using orthogonal distance regression in all panels and the results are provided in the legends.