Originally Posted by
tobyzhang
Feel like the new engineers and production guys at tamiya are less well versed in tolerance control than their predecessors. The C hub has more slop than the older ones and the shocks leaks way more than the older TRF shocks as well. Not to mention the M07 needs lots of sanding to get binding free suspension for both the front and the rear. We understand to fix tolerance for a injection molded part will cost Tamiya a lot of money because the tooling will have to be altered. But still man, the older stuff are showing better fit.
The O-Ring I feel I can't really blame Tamiya. Those for sure are parts made by third party but Tamiya should still give solution to make the o ring work with their hardware better. I tried the 0.15 shim and it works pretty well actually.
The overall mechanical design are still very good and the machining are still top notch. But someone is definitely slacking in the tolerance department.
I did notice better tolerance in the 419X arms though so maybe they did try to improve things at least for the newer toolings.
The other problem is that they are using existing molds for new materials. When the materials cure, they don't cure to the same size as the other types of plastics. This is what causes the slop or binding. I don't actually mind slop that much because slop is created over time through friction, you can generally offset slop with shims.