FWIW, be aware that there are two different types of crimping tools.
One type just smashes it flat, and can be undone by using the crimping tool but rotate the connector 90 degrees.
The other type punches the metal down, leaving quite an indent. These ca not be undone.
For some situations, such as the full circle connectors that I use on the end of the wires where I attach them to the batteries, I also solder the wire to the connector. So I have it crimped with the permanent type and then soldered. I have never seen this technique result in a failure.
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