Before eveyone piles on with their defective parts stories, I would like to say that I have purchased tens of thousands of dollars of parts, mainly from SNG Barratt. I would estimate my rate of defective parts as less than 1%. And SNG has made those few situations good without any squacks or pushback.
Unfortunately, in the world of auto parts, we are small fish in a small pond. For some parts, there may only be one fabricator of them. If they are having a bad day or worse a bad month, or just don’t give a damn, the damage is done. We are the Beta testers. I think SNG is pretty good at weeding out the ones that don’t give a damn. I like to establish a relationship with a supplier and stick with them. I don’t chase lowest price. Sometimes you really do get what you pay for.
As Wiggles points out, the Rolon chain tensioners are known junk. I’m sure others will bring up other examples. Regarding sheet metal, the cars were hand built. Under the circumstances, I always expect to fettle on my sheet metal. Just part of the journey.
We have a policy of not trashing vendors but good words are not prohibited, are they. I would give a positive shout out to SNG, EtypeFabs, Monocouque-Metalworks, Rhode Island Wiring, and Coolcat for stuff that has fit well, minimal hassles.