From my observation:
Gear Box:
It will be similar to the TG10 gear box. You just need to unscrew 4 screws and the ball diff is out. Unlike the TB EVO 1 and 2 series which needs serious screwing to take it out.
Spur Gear:
It uses a special spur gear adapter which you can make use of the 48pitch or 64 pitch spur gears. I have the adapter for the spur gear but I can't seems to find the correct spur for my TB Evo2. It is made by CROSS
Arms:
Similar to those of the 414 and Ta04.
Weight:
Should significantly lighter than the EVO2 series.
Well hopefully, this car is able to change the roll centre as well just like the 414M series. Keep our fingers cross