I think I remember seeing those small rubber friction rings for the driver of the drive wheel on the Japan auctions. I didn't need them so I didn't look into them closer but I remember them because I thought to myself there would be quite an interest for those who have these older type drives as I imagine that is a replaceable part that wears out first whether it be from use or deterioration from age and weather. New sets of those might just correct your traction woes. Like in the video, you may want to look for an extra reverse track or two which I have seen many times listed in the Japan auctions too.
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