ORIGINAL: ozchris
upper arm does not touch gear cover dont no what your talking about mad wax you said (reason for failure last time) has not failed gears worn out due to rocks sand not because
arm is touching
they do touch when model is moving - the upper plastic rear arm is the worst part to flex and they have been known to hit the lexan gear covers or damage the spur gear,but if it works for you then stick with it - but you find most large scale owners tend to prefer alloy rear upper arms to elimante that problem