I’m glad this is helping!
One of the reasons behind 126% and 152% (+ FOV 95%) is that with the Index native panel resolution and lens distortion, it seems to me these are slightly enhancing aliasing compared for example to 125 and 150, compensating a little bit for the blurriness due to motion smoothing and/or FS2020 rendering. It is really subjective though but it seems it is striking a balance to me, enough to make barely legible middle EFIS small letters slightly more legible (but aliased).