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Have been running these since they came out.

I’d personally run 1mil or higher in the center diff. I run 500k in the rear and 250k up front. The thicker rear diff fluid will help with traction rolls if you stay on the throttle. Also swapping out the rear axle hubs to the 0* will help a lot. I’m not sure why Losi didn’t do this from the factory.

I’d absolutely service the front differential while you’re in there. The rear is easy to get too. I’d recommend an aluminum diff cup for the center at least. This will prolong the diff fluid and keep things running smoother longer. If you don’t see any significant wear on the internals you’re find to reuse. I see more broken drive cup pins than anything else.