diff --git a/libtest.png b/libtest.png
index 788a0df..d840cac 100644
Binary files a/libtest.png and b/libtest.png differ
diff --git a/libtest.scad b/libtest.scad
index 038ba71..2f18851 100644
--- a/libtest.scad
+++ b/libtest.scad
@@ -136,7 +136,7 @@ translate([x5, cable_grommets_y + 250])
 translate([900, 600])
     box_test();
 
-translate([850, 1170])
+translate([850, 1220])
     bbox_test();
 
 x0 = 0;
@@ -204,7 +204,7 @@ translate([x0, linear_bearings_y]) {
     rods();
 }
 
-translate([x0+120, linear_bearings_y+30]) {
+translate([x0+150, linear_bearings_y+30]) {
     extrusions();
 }
 
diff --git a/readme.md b/readme.md
index 3f3929a..950cf27 100644
--- a/readme.md
+++ b/readme.md
@@ -1293,6 +1293,9 @@ LMnUU linear bearings.
 | Function | Description |
 |:--- |:--- |
 | ```bearing_dia(type)``` | Outside diameter |
+| ```bearing_groove_dia(type)``` | Groove diameter |
+| ```bearing_groove_length(type)``` | Groove length |
+| ```bearing_groove_spacing(type)``` | Spacing between grooves, outer to outer, ie includes the grooves themselves |
 | ```bearing_length(type)``` | Total length |
 | ```bearing_rod_dia(type)``` | Internal diameter |
 
@@ -1311,12 +1314,21 @@ LMnUU linear bearings.
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
+|   1 | ```linear_bearing(LM10LUU)``` |  Linear bearing LM10LUU |
 |   1 | ```linear_bearing(LM10UU)``` |  Linear bearing LM10UU |
+|   1 | ```linear_bearing(LM12LUU)``` |  Linear bearing LM12LUU |
 |   1 | ```linear_bearing(LM12UU)``` |  Linear bearing LM12UU |
+|   1 | ```linear_bearing(LM16LUU)``` |  Linear bearing LM16LUU |
+|   1 | ```linear_bearing(LM16UU)``` |  Linear bearing LM16UU |
+|   1 | ```linear_bearing(LM3LUU)``` |  Linear bearing LM3LUU |
 |   1 | ```linear_bearing(LM3UU)``` |  Linear bearing LM3UU |
+|   1 | ```linear_bearing(LM4LUU)``` |  Linear bearing LM4LUU |
 |   1 | ```linear_bearing(LM4UU)``` |  Linear bearing LM4UU |
+|   1 | ```linear_bearing(LM5LUU)``` |  Linear bearing LM5LUU |
 |   1 | ```linear_bearing(LM5UU)``` |  Linear bearing LM5UU |
+|   1 | ```linear_bearing(LM6LUU)``` |  Linear bearing LM6LUU |
 |   1 | ```linear_bearing(LM6UU)``` |  Linear bearing LM6UU |
+|   1 | ```linear_bearing(LM8LUU)``` |  Linear bearing LM8LUU |
 |   1 | ```linear_bearing(LM8UU)``` |  Linear bearing LM8UU |
 
 
@@ -2279,6 +2291,7 @@ Steel rods and studding with chamfered ends.
 | ---:|:--- |:---|
 |   1 | ```rod(10, 80)``` |  Smooth rod 10mm x 80mm |
 |   1 | ```rod(12, 80)``` |  Smooth rod 12mm x 80mm |
+|   1 | ```rod(16, 80)``` |  Smooth rod 16mm x 80mm |
 |   1 | ```rod(3, 80)``` |  Smooth rod 3mm x 80mm |
 |   1 | ```rod(4, 80)``` |  Smooth rod 4mm x 80mm |
 |   1 | ```rod(5, 80)``` |  Smooth rod 5mm x 80mm |
@@ -2286,6 +2299,7 @@ Steel rods and studding with chamfered ends.
 |   1 | ```rod(8, 80)``` |  Smooth rod 8mm x 80mm |
 |   1 | ```studding(10, 80)``` |  Threaded rod M10 x 80mm |
 |   1 | ```studding(12, 80)``` |  Threaded rod M12 x 80mm |
+|   1 | ```studding(16, 80)``` |  Threaded rod M16 x 80mm |
 |   1 | ```studding(3, 80)``` |  Threaded rod M3 x 80mm |
 |   1 | ```studding(4, 80)``` |  Threaded rod M4 x 80mm |
 |   1 | ```studding(5, 80)``` |  Threaded rod M5 x 80mm |
diff --git a/tests/linear_bearings.scad b/tests/linear_bearings.scad
index ebe6485..6d54a03 100644
--- a/tests/linear_bearings.scad
+++ b/tests/linear_bearings.scad
@@ -22,8 +22,12 @@ use <../utils/layout.scad>
 include <../vitamins/linear_bearings.scad>
 
 module linear_bearings()
-    layout([for(b = linear_bearings) 2 * bearing_radius(b)])
+    layout([for(b = linear_bearings) 2 * bearing_radius(b)]) {
         linear_bearing(linear_bearings[$i]);
 
+        translate([0, 30])
+            linear_bearing(long_linear_bearings[$i]);
+    }
+
 if($preview)
     linear_bearings();
diff --git a/tests/png/linear_bearings.png b/tests/png/linear_bearings.png
index e4a4b86..b625123 100644
Binary files a/tests/png/linear_bearings.png and b/tests/png/linear_bearings.png differ
diff --git a/tests/png/rod.png b/tests/png/rod.png
index 8bfea67..70b8738 100644
Binary files a/tests/png/rod.png and b/tests/png/rod.png differ
diff --git a/tests/rod.scad b/tests/rod.scad
index 0e25577..75431c4 100644
--- a/tests/rod.scad
+++ b/tests/rod.scad
@@ -28,7 +28,7 @@ module rods()
 
         rod(bearing_rod_dia(linear_bearings[$i]), 80);
 
-        translate([0, 20])
+        translate([0, 30])
             studding(bearing_rod_dia(linear_bearings[$i]), 80);
     }
 
diff --git a/vitamins/linear_bearings.scad b/vitamins/linear_bearings.scad
index 1b26ff0..e92ee3a 100644
--- a/vitamins/linear_bearings.scad
+++ b/vitamins/linear_bearings.scad
@@ -38,6 +38,7 @@ LM4LUU  = ["LM4LUU",  23,  8,  4,   0,    0,    0];
 LM3UU   = ["LM3UU",   10,  7,  3,   0,    0,    0];
 LM3LUU  = ["LM3LUU",  19,  7,  3,   0,    0,    0];
 
-linear_bearings = [LM3UU, LM4UU, LM5UU, LM6UU, LM8UU, LM10UU, LM12UU, LM16UU, LM3LUU, LM4LUU, LM5LUU, LM6LUU, LM8LUU, LM10LUU, LM12LUU, LM16LUU];
+linear_bearings      = [LM3UU,  LM4UU,  LM5UU,  LM6UU,  LM8UU,  LM10UU,  LM12UU,  LM16UU];
+long_linear_bearings = [LM3LUU, LM4LUU, LM5LUU, LM6LUU, LM8LUU, LM10LUU, LM12LUU, LM16LUU];
 
 use <linear_bearing.scad>