improvement of the improved filament monitor

In this remix I combined the filament feeder by Nvalencia with a filament guide made by DarkDragonWing (http://www.thingiverse.com/thing:2008067).
In my opinion it works better than the original one, as one pulley has been replaced with a mechanism which allows more fluent movements.

I strongly suggest to use it with the bracket made by grogrules (https://www.thingiverse.com/thing:2206034), it works better.