Visibility amplitudes for a model image of a semi-analytic advection-dominated accretion flow (ADAF) model of Sgr A^* (Broderick et al. 2011) with a FWHM of ∼60 μas as a function of (u, v) distance sampled by the EHT in 2017 with and without the LMT (affecting mid-range baselines). The regularizer ℛ_Σ governs the visibility amplitude behavior at short baselines until the 1/e point. This allows us to constrain and correct limitations and uncertainties in LMT calibration based on the expected behavior of the LMT–SMT mid-range baseline.