I got a broken M03 front C hub. 3d printing has come to the rescue.
I started with a 20% fill and it works great.
Of course there are some sanding, filing and drilling that have to be done before the printout can actually fit in.
Does it really hold up? It depends! See the photo below, an Optima is equipped with a 3d printed C hub too. It breaks after several packs of 2S.
You need to try out different filament under different settings to get a perfect C hub.
This one is for the Tamiya Wild Dagger:
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