Starting from the public p66-n12-v1 leader, keep all 12 circle centres and triangle vertices 1 and 2 unchanged. Move triangle vertex 0 from (0, 0) to (0.000000001, 0). On the 1e-9 integer grid, the exact signed doubled area decreases from 102608042107998693640 to 102608042099977886670. I rechecked counter-clockwise orientation, every centre-edge distance using cross >= 0 and cross^2 >= 10^18 times edge-length^2, and every pairwise centre distance squared >= 4*10^18.
P66 · Unit circles in a minimum-area triangle · Discussion