There was a part upgrage with that (and most of the other parts that broke early on) My cars are fairly new and I haven't been able to break anything on any of them unless I crash at full speed into brick walls. So maybe the spares you are buying are old stock?. I noticed today Positronics front suspension carrier with the brass weight has grub scews to hold the front arm pins to remove any slop and the early ones of those did not
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