diff --git a/docs/PRODUCTION-PLAN.md b/docs/PRODUCTION-PLAN.md
index 094cca6..313cec8 100644
--- a/docs/PRODUCTION-PLAN.md
+++ b/docs/PRODUCTION-PLAN.md
@@ -432,9 +432,13 @@ passed; a third ran the soak (6.2) and measured performance (6.3). To continue:
   and `run.py` says when Max has rewritten the page, to commit it. Max's page matches the committed
   one but for the description, which predated 2.4's text — now committed. The start-up lines are
   not this object's: they still appear while its page is written.
-- [ ] **6.9 The help patcher and `numpy_allpass.py`** — the help patcher points to the `numpy_gain`
+- [x] **6.9 The help patcher and `numpy_allpass.py`** — the help patcher points to the `numpy_gain`
   and `allpass` examples but not to `numpy_allpass`, the one that shows what the block path is for;
-  add it in Max (and re-save), perhaps with the measured comparison.
+  add it in Max (and re-save), perhaps with the measured comparison. *Done:* the examples note names
+  `numpy_allpass` as the same filter per vector, to swap in and watch the patcher's CPU meter (the
+  ReadMe's tables are the measured comparison); and a new note says what 2.4 made true —
+  `process()`'s parameters are the inlets, its return hint the outlets, `stereo_width` has two of
+  each, and a save that changes them changes the object. Checked open in Max 9.1.5.
 - [x] **6.10 One traceback per broken save** — a file that fails to load is not cached, so every
   object sharing it runs it and prints the traceback: 25 objects, 25 tracebacks. 6.7 left this
   alone, because the obvious fix — remember the failing source and stay quiet — would also hide
diff --git a/help/tap.python~.maxhelp b/help/tap.python~.maxhelp
index 411d714..41e1fcf 100644
--- a/help/tap.python~.maxhelp
+++ b/help/tap.python~.maxhelp
@@ -10,7 +10,7 @@
 		}
 ,
 		"classnamespace" : "box",
-		"rect" : [ 100.0, 100.0, 780.0, 600.0 ],
+		"rect" : [ 100.0, 100.0, 780.0, 650.0 ],
 		"bglocked" : 0,
 		"openinpresentation" : 0,
 		"default_fontsize" : 13.0,
@@ -351,17 +351,30 @@
 					"text" : "forces a reload; saving the file does it for you"
 				}
 
+			}
+, 			{
+				"box" : 				{
+					"fontsize" : 13.0,
+					"id" : "obj-41",
+					"linecount" : 4,
+					"maxclass" : "comment",
+					"numinlets" : 1,
+					"numoutlets" : 0,
+					"patching_rect" : [ 270.0, 510.0, 300.0, 76.0 ],
+					"text" : "process()'s parameters are the object's signal inlets and its return hint its outlets: [tap.python~ stereo_width] has two of each. A save that changes them changes the object's inlets and outlets."
+				}
+
 			}
 , 			{
 				"box" : 				{
 					"fontsize" : 13.0,
 					"id" : "obj-37",
-					"linecount" : 6,
+					"linecount" : 9,
 					"maxclass" : "comment",
 					"numinlets" : 1,
 					"numoutlets" : 0,
-					"patching_rect" : [ 20.0, 450.0, 235.0, 122.0 ],
-					"text" : "More examples in the python folder: [tap.python~ numpy_gain] processes a whole signal vector per call with numpy, the form to use when it has to run in real time; [tap.python~ allpass] is an allpass filter that sizes its delay line in prepare()."
+					"patching_rect" : [ 20.0, 450.0, 235.0, 180.0 ],
+					"text" : "More examples in the python folder: [tap.python~ numpy_gain] processes a whole signal vector per call with numpy, the form to use when it has to run in real time; [tap.python~ allpass] is an allpass filter that sizes its delay line in prepare(), and [tap.python~ numpy_allpass] the same filter per vector: swap one for the other and watch the CPU meter."
 				}
 
 			}