MK7 filament guide for Freaks3D Printer, Flexible Filament

Bought a Freaks3D Printer , flexible filament (TPU) printing was a problem.
The TPU filament transport had a jam very often (filament went around with the
bearing) resulting in a failed print.

Made a new guide for it which supports the filament better and
also changed the drive gear to this one :
http://www.ebay.de/itm/301774091093?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Technische Daten :

Ouside diameter:--------------12mm
lenght:------------------------------