I raced this car for around 3 meetings wtih no issues at all. I built the car with the white idlers as I didn't like how rough the gearbox felt with the alloy one when the car was new.
On its 4th meeting a landed off the double, not very hard and obliterated both gears. As you have said, the bearing protrudes and with case flex, touches the bearing. I've currently went back to the metal idlers, although the car is noisy now.
Good tip with the spacing, worth a try.
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Ardgay Models
Schumacher
CORE-RC
Hobbywing
Mark One Designs
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