@jfkthame's CanvasTest patch suggestion

CanvasTest_new_diff_ttx.patch

diff -u CanvasTest.ttx CanvasTest_new.ttx
--- CanvasTest.ttx	2023-08-22 13:41:40
+++ CanvasTest_new.ttx	2023-08-22 13:41:43
@@ -22,12 +22,12 @@
     <!-- Most of this table will be recalculated by the compiler -->
     <tableVersion value="1.0"/>
     <fontRevision value="1.0"/>
-    <checkSumAdjustment value="0x6f05675"/>
+    <checkSumAdjustment value="0xea27d36b"/>
     <magicNumber value="0x5f0f3cf5"/>
     <flags value="00000000 00001011"/>
     <unitsPerEm value="1024"/>
     <created value="Sat Feb 27 16:54:16 2010"/>
-    <modified value="Sat Feb 27 16:54:16 2010"/>
+    <modified value="Wed Jul 19 16:37:33 2023"/>
     <xMin value="-1003"/>
     <yMin value="-805"/>
     <xMax value="1580"/>
@@ -56,7 +56,7 @@
     <reserved2 value="0"/>
     <reserved3 value="0"/>
     <metricDataFormat value="0"/>
-    <numberOfHMetrics value="4"/>
+    <numberOfHMetrics value="3"/>
   </hhea>
 
   <maxp>
@@ -81,7 +81,7 @@
   <OS_2>
     <!-- The fields 'usFirstCharIndex' and 'usLastCharIndex'
          will be recalculated by the compiler -->
-    <version value="1"/>
+    <version value="4"/>
     <xAvgCharWidth value="1024"/>
     <usWeightClass value="500"/>
     <usWidthClass value="5"/>
@@ -114,7 +114,7 @@
     <ulUnicodeRange3 value="00000000 00000000 00000000 00000000"/>
     <ulUnicodeRange4 value="00000000 00000000 00000000 00000000"/>
     <achVendID value="PfEd"/>
-    <fsSelection value="00000000 01000000"/>
+    <fsSelection value="00000000 11000000"/>
     <usFirstCharIndex value="9"/>
     <usLastCharIndex value="69"/>
     <sTypoAscender value="768"/>
@@ -124,6 +124,11 @@
     <usWinDescent value="805"/>
     <ulCodePageRange1 value="00000000 00000000 00000000 00000001"/>
     <ulCodePageRange2 value="00000000 00000000 00000000 00000000"/>
+    <sxHeight value="512"/>
+    <sCapHeight value="768"/>
+    <usDefaultChar value="32"/>
+    <usBreakChar value="32"/>
+    <usMaxContext value="0"/>
   </OS_2>
 
   <hmtx>
@@ -475,7 +480,7 @@
       CanvasTest
     </namerecord>
     <namerecord nameID="5" platformID="1" platEncID="0" langID="0x0" unicode="True">
-      Version 001.000 
+      Version 001.000
     </namerecord>
     <namerecord nameID="6" platformID="1" platEncID="0" langID="0x0" unicode="True">
       CanvasTest
@@ -498,7 +503,7 @@
       CanvasTest
     </namerecord>
     <namerecord nameID="5" platformID="3" platEncID="1" langID="0x409">
-      Version 001.000 
+      Version 001.000
     </namerecord>
     <namerecord nameID="6" platformID="3" platEncID="1" langID="0x409">
       CanvasTest