Index: drc_query.conf
===================================================================
--- drc_query.conf	(revision 30855)
+++ drc_query.conf	(revision 30856)
@@ -119,6 +119,19 @@
 						query = { poly_num_islands(@) > 1 }
 					}
 
+					ha:ko_named {
+						type = courtyard
+						title = Courtyard collision
+						desc = Courtyard objects overlap - this usually indicates 3d conflict between parts
+						query = {
+rule courtyard
+let A (@.layer.purpose ~ "^ko.") thus @
+let B A
+assert (A != B) && (A.layer.purpose == B.layer.purpose) && (overlap(A, B)) \\
+	thus violation(DRCGRP1, A, DRCGRP2, B)
+}
+					}
+
 				}
 			}
 		}