MakerBot Replicator 2X tube holder

Sometimes when your filament tangles and you're not there, it gets tensioned and slightly "chews" your silicone filament guide tubes and they stop sitting still in the metal brackets on the back of the printer.

I created this additional part that can be snapped on top of those brackets to help keep hold the tubes.

This model is in particular for MakerBot 2X with dual extruders.