Hi All, I've had my Titan Aero for about 2 months and things have been great. Up until now everything has been peachy with the hot end and extruder. I have a 1.75 mm 12v with smaller extruder motor option. But a few times in the past, and recently this morning at hour 4 of a long 14 hour print, i notice the gear on the motor shaft skips/slips on the plastic flywheel gear and has a clear audible chatter. Tension on the filament spring does nothing to change this, and the first 3.8 hours everything was fine too. I can visible see the metal gear slipping on the plastic one. Had to stop the print because it was not extruding any filament. I don't think it's a clog in the nozzel because i can easily push filament through with my hand and from the LCD menu commands too. What could be the cause? Are there any metal gear upgrades for this piece? Any one else have this issue before?