Those are a beautiful gear set, precision manufactured and worth the price. For what it's worth, like many (all?) of us, I have items in my home and garage of Chinese manufacture. I have noticed that all the items using a white plastic/nylon material as a washer or cushioning spacer have cracked - even though no stress has been placed on them. All the items I have that use this material are stored inside under normal room temperature but do not last long. Not sure if it is the chemistry of the nylon that the manufacturers cannot get right, or if their supply or raw material is to blame? Everything else that I use coming from China from car engine parts (Ford crankshafts) to model railway items, to tools have been excellent quality. I know some of the items coming from there are one job only and cheap, but so far I've had no problems.
Changing subject if I may, having recently started modelling in 'O'scale and having purchased some really excellent Dapol wagons and locomotives from a Canadian distributor, I have been searching for a new (good luck!) or used Heljan Class 33 Diesel. As in other facets of my life, I have missed the bus one too many times. I did see one for sale for a reasonable price on the S & J Models site, but it has been sold, and they would not ship abroad even though their site provided options to do so. So far no one has advertised an 'O' Class 33 on any of the usual on-line 'bay' sites, and no one is even asking ridiculous prices as everyone that owns one wants to keep it. I wonder if anyone on this forum knows or has heard of someone who wants to sell a Heljan 'O'scale Class 33 in all green or green with small yellow ends please?
I am not a collector or hoarder of model railway items, but just want to run one on my B.R. (S) layout. Tower Models advised that Heljan were really disappointed that it took 2 years to sell out their stocks of the 33 when it first came out. If the fact that they all sold, and none are on the market, surely even with the gear problems, they must be popular? I contacted Heljan, and a very helpful lady advised that they are considering re-runs of some of the 'O' scale models. Hopefully the 33 will be one of the runs.
Cheers E.W.