diff --git a/docs/impl/reports/Z27AG-CAN-PRIOR-ART.md b/docs/impl/reports/Z27AG-CAN-PRIOR-ART.md
index 83bcd17..14bf0e6 100644
--- a/docs/impl/reports/Z27AG-CAN-PRIOR-ART.md
+++ b/docs/impl/reports/Z27AG-CAN-PRIOR-ART.md
@@ -56,8 +56,7 @@ matches the EU CZT's), while its body frames come from smart's SAM module: on th
 Mercedes body electronics" ([smartcarmanuals](https://smartcarmanuals.com/models/454-forfour/)).
 Expect, from a Brabus capture: engine frames equal, chassis frames (ABS, the shared
 electric steering) probably equal, body frames different. No Brabus or CZT capture
-is public; asking an owner for a minute of `candump` at the OBD port is the cheap way
-to get one. The same manual notes that the **Euro CZT has no MAP sensor**, so OBD PID
+is public, and none is being sought: the Z27's own recordings are the source. The same manual notes that the **Euro CZT has no MAP sensor**, so OBD PID
 `0B` may be unsupported on the Z27 (`obd-poller` discovers that by itself). The smart
 fortwo 451 ([hackaday.io](https://hackaday.io/project/19931-smart-fortwo-can-bus-reverse-engineering))
 shares `423` as the cluster status frame, little else.