³Ô¹Ïtv / ENGINEERING NOTEEvidence sequence: Bergquist vs FR-4 PCB1CandidateExact grade and complete stack on both sides.2BoundarySame heat source, mounting, sensor endpoints and interface scope.3ProductRouting, isolation, service and assembly considered.4CommercialEqual installed scope with substitutions explicitly reviewed.Conceptual drawing. Not to scale; not manufacturing or compliance evidence.