Microsoft Sculpt Comfort Mouse Button Binding for OSX (using Karabiner)

private.xml

<!--
Microsoft Sculpt Comfort Mouse Binding for OSX (using Karabiner)
Window Button => Launchpad
Slide Down, Scroll Left => Backward (Cmd+[)
Slide Up, Scroll Right => Forward (Cmd+])
A modified version from http://www.tslimi.tk/myblog/view.php?name=Touchpad+Support+of+Microsoft+Sculpt+Comfort+Mouse+for+OS+X
-->
<?xml version="1.0"?>
 <root>
   <devicevendordef>
     <vendorname>MICROSOFT</vendorname>
     <vendorid>0x045e</vendorid>
   </devicevendordef>

   <deviceproductdef>
     <productname>SCULPT_COMFORT</productname>
     <productid>0x07a2</productid>
   </deviceproductdef>
   <item>
     <name>Windows Button to LaunchPad (Microsoft Sculpt Comfort Mouse)</name>
     <identifier>com.microsoft.mouse.sculpt_comfort.win_button</identifier>
     <device_only>DeviceVendor::MICROSOFT,DeviceProduct::SCULPT_COMFORT</device_only>
     <autogen>
       __KeyToKey__
       KeyCode::COMMAND_L,
       KeyCode::LAUNCHPAD
     </autogen>
   </item>
   <item>
     <name>Slide Up to Backward (Microsoft Sculpt Comfort Mouse)</name>
     <identifier>com.microsoft.mouse.sculpt_comfort.slide_up</identifier>
     <device_only>DeviceVendor::MICROSOFT,DeviceProduct::SCULPT_COMFORT</device_only>
     <autogen>
       __KeyToKey__
       KeyCode::DELETE, ModifierFlag::CONTROL_L,
       KeyCode::BRACKET_RIGHT, ModifierFlag::COMMAND_L
     </autogen>
   </item>
   <item>
     <name>Slide Down to Forward (Microsoft Sculpt Comfort Mouse)</name>
     <identifier>com.microsoft.mouse.sculpt_comfort.slide_down</identifier>
     <device_only>DeviceVendor::MICROSOFT,DeviceProduct::SCULPT_COMFORT</device_only>
     <autogen>
       __KeyToKey__
       KeyCode::TAB, ModifierFlag::CONTROL_L,
       KeyCode::BRACKET_LEFT, ModifierFlag::COMMAND_L
     </autogen>
   </item>
   <item>
     <name>Scroll Left to Backward (Microsoft Sculpt Comfort Mouse)</name>
     <identifier>com.microsoft.mouse.sculpt_comfort.scroll_left</identifier>
     <device_only>DeviceVendor::MICROSOFT,DeviceProduct::SCULPT_COMFORT</device_only>
     <autogen>
       __ScrollWheelToKey__
       ScrollWheel::LEFT,
       KeyCode::BRACKET_LEFT, ModifierFlag::COMMAND_L
     </autogen>
   </item>
   <item>
     <name>Scroll Right to Forward (Microsoft Sculpt Comfort Mouse)</name>
     <identifier>com.microsoft.mouse.sculpt_comfort.scroll_right</identifier>
     <device_only>DeviceVendor::MICROSOFT,DeviceProduct::SCULPT_COMFORT</device_only>
     <autogen>
       __ScrollWheelToKey__
       ScrollWheel::RIGHT,
       KeyCode::BRACKET_RIGHT, ModifierFlag::COMMAND_L
     </autogen>
   </item>
 </root>

Any chance of getting this to work on mac os Sierria with karabiner elements?

It looks to me like Elements doesn't allow custom mappings -- or even keys with modifiers yet. Correct me if I'm mistaken... I'm basically having to wait to upgrade due to this alone.