"Wasn't very hard to lay the terminal into the various crimper jaws to tell which one was going to work. "
Work, yes. A bench vise also works perfectly well for years. Usually.
That doesn't means it works properly.
The facts of simple production are that any die, any tooling, will eventually wear out beyond spec. This is one reason why automakers now often brag about "hydroforming", where they don't stamp sheet metal between two dies, but use water
pressure to "flow" the metal into just one half of the die. Half as many big expensive precision dies to wear out, half the cost, less downtime.
So what happens when Amp or Amphenol or someone else has made 50,000 dies for a crimping tool and the master die is out of spec and has to be thrown out?
Either they sell it as "worn out", or if the factory is in China
...the manager often takes the worn parts
, indicates they were thrown out or sold as scrap, and then he promptly hands them to his brother in law to use on the illicit night shift, in the same plant, making junk tools that LOOK the same as the legitimate ones that the factory owners know are made during the daytime.
Yes, it happens, and has been documented to happen exactly that way.
If these jokers (wrt what Mainesail said) ever actually MADE THEIR OWN DIES, then sooner or later one set or another would actually be IN SPEC. It doesn't cost any more to make them IN SPEC, if you are actually making them in the first place. As opposed to picking from the trash pile.
Might they work well enough? Sure, hell yes. And I've replaced circlips on distributor points and steel
with picture wire, only to find some mechanic
a year later screaming "WHO DID THIS TO MY ENGINE!"
I think my best kludge was to replace a Y-valve (bypass) thermostat with a carefully chosen ROCK. For the two weeks we had to wait for a new thermostat, the engine
ran perfectly. "YOU PUT A WHAT?! IN MY ENGINE
Can't argue with success. Not really. But that doesn't make it right.