diff --git a/engine-cli/src/main/resources/commandline.md b/engine-cli/src/main/resources/commandline.md
index 308fc4c7c..f3edbd25c 100644
--- a/engine-cli/src/main/resources/commandline.md
+++ b/engine-cli/src/main/resources/commandline.md
@@ -107,29 +107,33 @@ Specify the graphite destination and enable reporting
 
     --report-graphite-to <addr>[:<port>]
 
-Specify the interval for graphite or CSV reporting in seconds (default: 10)
+Specify the interval for graphite or CSV reporting in seconds:
 
-    --report-interval <interval-seconds>
+    --report-interval 10
 
-Specify the metrics name prefix for graphite reporting
+Specify the metrics name prefix for graphite reporting:
 
     --metrics-prefix <metrics-prefix>
 
-Log all HDR histogram data to a file
+Log all HDR histogram data to a file:
 
     --log-histograms histodata.log
     --log-histograms 'histodata.log:.*'
     --log-histograms 'histodata.log:.*:1m'
     --log-histograms 'histodata.log:.*specialmetrics:10s'
 
-Log HDR histogram stats to a CSV file
+Log HDR histogram stats to a CSV file:
 
     --log-histostats stats.csv
     --log-histostats 'stats.csv:.*'       # same as above
     --log-histostats 'stats.csv:.*:1m'    # with 1-minute interval
     --log-histostats 'stats.csv:.*specialmetrics:10s'
 
-Adjust the progress reporting interval
+Adjust the HDR histogram precision:
+
+    --hdr-digits 3
+
+Adjust the progress reporting interval:
 
     --progress console:1m
 
diff --git a/virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/conversions/from_bytebuffer/ToHexString.java b/virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/conversions/from_bytebuffer/ToHexString.java
index 1f6d3e5cd..4fa5c94f9 100644
--- a/virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/conversions/from_bytebuffer/ToHexString.java
+++ b/virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/conversions/from_bytebuffer/ToHexString.java
@@ -17,10 +17,16 @@ public class ToHexString implements Function<ByteBuffer,String> {
 
     private final boolean useUpperCase;
 
+    /**
+     * Convert the ByteBuffer's contents to a hex string using upper case by default.
+     */
     public ToHexString() {
         this(true);
     }
 
+    /**
+     * Convert the ByteBuffer's contents to a hex string upper or lower case.
+     */
     public ToHexString(boolean useUpperCase) {
         this.useUpperCase = useUpperCase;
     }
diff --git a/virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/from_long/to_bytebuffer/ToMD5ByteBuffer.java b/virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/from_long/to_bytebuffer/ToMD5ByteBuffer.java
index 9017ce077..2c28e27c9 100644
--- a/virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/from_long/to_bytebuffer/ToMD5ByteBuffer.java
+++ b/virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/from_long/to_bytebuffer/ToMD5ByteBuffer.java
@@ -13,7 +13,7 @@ import java.util.function.LongFunction;
 /**
  * Converts the byte image of the input long to a MD5 digest in ByteBuffer form.
  */
-@Categories(Category.conversion)
+@Categories({Category.conversion,Category.premade})
 @ThreadSafeMapper
 public class ToMD5ByteBuffer implements LongFunction<ByteBuffer> {
 
diff --git a/virtdata-userlibs/src/main/java/io/nosqlbench/virtdata/userlibs/streams/fillers/ChunkedByteBuffer.java b/virtdata-userlibs/src/main/java/io/nosqlbench/virtdata/userlibs/streams/fillers/ChunkedByteBuffer.java
index 07cba703a..a0d9d0430 100644
--- a/virtdata-userlibs/src/main/java/io/nosqlbench/virtdata/userlibs/streams/fillers/ChunkedByteBuffer.java
+++ b/virtdata-userlibs/src/main/java/io/nosqlbench/virtdata/userlibs/streams/fillers/ChunkedByteBuffer.java
@@ -25,7 +25,7 @@ import java.util.Iterator;
  *
  * <H2>Usage Patterns</H2>
  *
- * This is intended to be called as an interative data source, where another
+ * This is intended to be called as an interactive data source, where another
  * iteration controls flow.
  *
  * <H2>Warnings</H2>