Haven't read anywhere about this, maybe I'm the first to notice and have a fix.
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There is a lot of flex at the steering post (44 figure 19 in RTR manual, 19a in G manual) put a carbon piece across the top of the two steering posts under the two washers (46) before installing the two screws. Don't know if there is any flex with the G chassis, just have the RTR.
Will post a picture soon.