The drag assisted one-way the Serpent 750 is a very nice option.
changing the conventional front diff, it allows you to nevertheless brake and submit like a diff however the exit drive and change of direction on-throttle is much better.
It's important though to adjust the oil viscosity in line with the available grip degree.
With lower grip level you should head to thicker oil to obtain more front stopping energy.
This innovative unit has the situation made from a unique magnesium alloy. The sum total weight could possibly be limited to only 22g!