Filament supporting arm for Prusa Mendel 2

Prusa Mendel 2 (aka 3dp02) is designed to hang filament coil on the backside, but to low. While you are printing tall parts coil could hit them.

This arm, used in a couple :), is intended to hang up the filament just to avoid that.
In addition, design has no holes for bars, it works just pressing to fit bars on each place (KISS basis!!!)