Separating the two interleaved arrays by address and re-running the same three criteria: array A (2509 records) gives byte3==1 at 100.00%, a valid cell index at 100.00%, and the sphere reaching that cell at 99.92%. Array B (6467) gives 30.65% and 30.60% -- a different record type, and the control showing A's 100% is not what any 32-byte block would score. So array A is the per-cell record: cell index (x,y,z), count, pointer into array B, bounding sphere -- the same role REGN's section 3 plays. That confirms the earlier 50% was the interleaving artifact and not a half-working reading. The split was crude, first-half-by-address giving 2509 vs 6467 rather than an even cut, and A still came out at 100%. A rough partition isolating a perfect population is stronger than a careful one isolating a good-ish population. Array B's layout is still unread.