Plastibot Expanded X-axis

The Plastibot Printers I look after are starting to show their age. Most of them have had their original hotends replaced with J-heads, but those too are wearing away. As such, I've decided to start switching out the depreciated J-heads and Makergear V1s for shiny new E3D V6 hotends.

Because of their Incorporated fan, the new hotends are slightly too large. That's where these files com in.

All Plastibot files can be found on the [Github page](https://github.com/plastibot/Plastibot-Mendel).