DF03 chassis

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Does anyone know if there is a chassis stiffner (like gearbox stiffner for the rear) but for the front and the whole chassis?

I heard about the mono chassis, as I understood is should be about 20mm longer, what would be a huge improvement for handling!

But I can't seem to find where to buy or what the correct name of this chassis is... (I know people call it the mono 7cell chassis, but i don't find anything by that name)

Can anyone help me?