Makerbot/Flashforge filament feed upgrade (prevent motor jam)

Mk2 is now here, download from my page!

Ever had to repeatedly un-jam flexi-filament from your MakerBot or FlashForge 3Dprinter?

Now you wont have to with this easy but effective upgrade.
All you have to do is replace one component with this new upgrade and motor jamming will be a thing of the past. Jamming my still occur occasional but the motor will not, helping to protect your motor from damage. Un-jamming is consequently much easier and can even be achieved by using the 'change filam