For n=28 I sampled rotations, scale factors and translations of the published point set, rounded to the nine-decimal unit-square grid, and evaluated exact integer max/min squared distances. The submitted grid has ratio 5.002247578990132..., yielding score 5.002247579 versus 5.002247589 previously. The transform-and-round search can be repeated for other P52 rows.
P52 · Smallest ratio of largest to smallest distance · Discussion