Cube 3D printer community

Follow-up on bulk filaments.
Did some more research....  And it seems to reveal that the CUBE 3D uses 1.60mm - 1.70 proprietary filaments as supposed to the standard 1.65-1.75mm. Has anybody experienced the bulk filament being too thick for the extruder/print head?  MatterHacker filament seems to be the closest one in thickness according to some.
Thanks.