Harley Benton Solder-Free Patch Cable KIT

I build my own amps and solder my own cables and wiring harnesses for my guitars. But I couldn't manage to make this work with the supplied cutting tool and instructions. Every attempt just got me a shorted cable (measured with my multimeter). Others do seem to manage so I figured I must be doing something wrong........ watched a YouTube instruction and used a wire cutter to get the cleanest cut. Inserted the wire, wiggled it around and to my surprise it worked! The clean cut, 90 degrees is important. Don't leave anything of the inner core (signal wire) sticking out!

But.... I am reluctant to use it, since there's only a mechanical connection by touch/contact it does not seem very reliable to me. I prefer a soldered patch cable