I see the rounded top part of the gear. To me, since it appears the side carbon plates are in line, it looks like there may be excess pressure from the tail boom and/or torque tube pushing on the transmission gears which in turn are causing it to be unevenly pushing on the main gear with a lean from the transmission gears.
Have you double checked that the end of the boom tube is exactly even with the inner boom clamp inside the frame? If so, you may want to back the tail box pressure away from the heli just a bit.
Regards,
Brandon Bartolomucci
Sent from my iPhone