i recently made a carbon tub chassis for my fk05 that moves things about slightly. motor is more central and lipo further out to balance chassis without weights. much stiffer in the vertical plane too, but softer when twisted. chassis has a thicker centre spine and thinner wings. battery location is also moulded into the chassis so the strap can be run looser so as to not affect the flex. handling is very similar to the standard fk05, at moment its a little more snappy on the rear and has more steering but i have not messed with the setup yet, in fact it needs decent diffs and new belts really before i start messing with setup as they are really ropey.
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