25% overhang seems too much

Packer.php

@@ -162,7 +162,7 @@ public function packBox(Box $aBox, ItemList $aItems) {
 
         $fitsSameGap = min($remainingWidth - $itemWidth, $remainingLength - $itemLength);
         $fitsRotatedGap = min($remainingWidth - $itemLength, $remainingLength - $itemWidth);
-        $notTooMuchShallower = ($layerDepth ? $aItems->top()->getDepth() > ($layerDepth * 0.75) : true);
+        $notTooMuchShallower = ($layerDepth ? $aItems->top()->getDepth() > ($layerDepth * 0.9) : true);
 
         if ($notTooMuchShallower && $fitsSameGap >= 0 && $fitsRotatedGap < 0) {
           $this->logger->debug("fits only without rotation");
@@ -215,8 +215,8 @@ public function packBox(Box $aBox, ItemList $aItems) {
           $this->logger->debug("doesn't fit at all");
 
           if ($layerWidth) {
-            $remainingWidth = min(floor($layerWidth * 1.25), $horizontalDimensions[0]);
-            $remainingLength = min(floor($layerLength * 1.25), $horizontalDimensions[1]);
+            $remainingWidth = min(floor($layerWidth * 1.1), $horizontalDimensions[0]);
+            $remainingLength = min(floor($layerLength * 1.1), $horizontalDimensions[1]);
             $layerWidth = 0;
             $layerLength = 0;
           }

README.md

@@ -22,7 +22,7 @@ Principles
  * Pack largest (by volume) items first
  * Pack vertically up the side of the box
  * Pack side-by-side of where item under consideration fits alongside the previous item
- * Only very small overhangs are allowed (25%) to prevent items bending in transit
+ * Only very small overhangs are allowed (10%) to prevent items bending in transit
  * The available width/height for each layer will therefore decrease as the stack of items gets taller
  * [TODO] If more then 1 box is needed to accommodate all of the items, then aim for
    boxes of roughly equal weight

tests/PackerTest.php

@@ -257,8 +257,8 @@ public function testPackThreeItemsBottom2FitSideBySideWithSpareSpaceOneOverhangS
 
       $items = new ItemList;
       $items->insert(new TestItem('Item 1', 200, 200, 4, 200));
-      $items->insert(new TestItem('Item 2', 120, 120, 4, 200));
-      $items->insert(new TestItem('Item 3', 120, 120, 4, 200));
+      $items->insert(new TestItem('Item 2', 110, 110, 4, 200));
+      $items->insert(new TestItem('Item 3', 110, 110, 4, 200));
 
       $packer = new Packer();
       $packedItems = $packer->packBox($box, $items);