Robo R1 gear extruder noise reduction

I made a special gear that has 2 walls on either sides that hold a wide rubber band in place to smooth out the friction between the gears for noise reduction,

Rubber band dimensions
Radios 25.61 mm
Thickness 1 mm
Width 9.75 mm

Grease/lubrication is up to the users choice i applied it and its a lot smother and quieter.