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It´s recommended for really high grip.
It uses a slightly modded motor plate from the 3 gear B5M gearbox. Top shaft and bearings (5x10x4) need to be also from a Factory Lite. You will need Left gearbox: http://shpws.me/KqJk, Right gearbox: http://shpws.me/KqJj and chasis+battery strap: http://shpws.me/Ixf9 . Chassis strap and battery strap are the same from the 4 gear LCG gearbox. There is also a new type of waterfall for both LCG gearboxes requiring two holes on the chassis: http://shpws.me/KFus
It is recommended to use a low total tooth count (pininon+spur between 99 and 102)so the motor sits low. For example 30-69 for stock and 21-78 for mod. Spur gear maximum size is a 78T. Otherwise it could hit the C arm mount.
CAUTION: 3D printed parts haven´t the precision that molded parts have. Some gearboxes work perfectly, some require a little bit of sanding.