Firstly I get about 4-6 months out of my diffs before they need attention, stock Kyosho parts but with Kyosho Ceramic main diff balls.
On top of that the ability to make an adjustment without having to strip the car down makes the ball diff a huge tuning aid. Also they are MUCH lighter which improves throttle response etc.
As for bashing you can just tighten them up a bit and set the slipper a bit tighter then back them off when you go racing and handling becomes the main focus again.
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