I thought the crimper for PL259's (on RG8 size coax) was
a great idea but after reading some reviews and looking
at the photos of cracks in the connector I'm not so sure.
I thought of buying a set of dies and fixing them to a
hefty arbor press I have in the garage. Though soldering
has proved reliable and I like reliable.
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Perhaps it is useful to mention PL259 connectors with a braid fixing
arrangement identical to the one of an N-connector .
That leaves the tech to only solder the centre pin.
They are more expensive (abt US$4.50 ea) but imho it's worth the
expenditure.

Frank KN6WH