That’s actually kind of a myth, and only applies to very fine files. Dragging is also faster. That was tested pretty thoroughly by FireballTools on YouTube. 
So if you’re dragging the file lightly on the back stroke, nothing bad’s gonna happen.
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I bought that book too. 
Kurzgesagt represent. 
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It’s actually been proven now that dragging them forwards and backwards cuts faster.
I still don’t do it.
edit: I see @Linesflag beat me to it
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WOW! That was a great video. It does rub me the wrong way as it goes against the science of cutting. 
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Using a pair of needle nose pliers or similar to set up the crimps near vertical & parallel before hand makes the crimping action with that tool go much more smoothly & better final result.
There’s a good video/writeup w/demonstration somewhere floating around… can’t remember the name of it off the top of my head tho. Will try to find if I have more time.
Technique gets you to the point of being able to crimp 24awg or larger in like 5 seconds, makes me cringe whenever I see people splicing tiny precrimped wires at this point
https://iotexpert.com/jst-connector-crimping-insanity/
^ I think this is the great writeup, but didn’t see the advice about making the crimp wings vertical before using the tool. May have picked that up from a YouTube video & applied it to the rest of advice in that article.
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My boy got that book for xmas! That light and the hot glue gun are my favorite Ryobi tools, I’ve burnt up everything else, but those keep going.
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Oooh I need a good hot knife for all my Halloween shenanigans.
I too do hot knives on halloween…
… I’ll see myself out
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I have this exact setup. It’s quite satisfying to churn out a bunch of nice crimps 
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Good to know. I have heard that crimping ain’t easy. 
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I solder those fuckers on.
Soldering them isn’t easy either. You have to apply the world’s tiniest amount of solder, with the wire pointed down and the pin up, and keep the heat on it for like just 200 milliseconds
Otherwise the solder wicks up into the connector and ruins it.
But I strongly prefer the soldered connections over crimped ones.
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I have started putting a tiny amount of solder on the connection on the 3d printer jst crimps since those cables move around a lot more. So far so good.
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I’ve just spent two days doing lots of these fuckers
These are JST GH which is a 1.25mm pitch. I’ve been going out my mind!
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I don’t even like soldering one of those things, much less all day.
You you use solder paste and hot air?
If I did those all day, I’d seriously consider it.
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Baked as fuck superbrain moment (except not actually baked 
)
Couldn’t you just magnetize the crimper & the terminals so it’s much less of a pain in the ass? Lay down a strip of like 100 crimps on a neodymium, clamp crimper teeth on one (a neo magnet) overnight… they should pretty much stick to each other once you place it in the teeth of the crimper, then you only have to worry about handling the wire.
Are you gonna pass that?
Fuck, I don’t have a neodymium but I just tried a poopy ferric & neither the jst or servo 3 pin terminals I have seemed to stick.
If they have like the slightest bit of magnetic metal in whatever alloy composition they use for them though, overnight on any neodymium would def induce the perfect amount to just stick on the crimper teeth.
Somebody explain to me why I’m wrong
Ok… seems like the average JST crimp off the street is made of phosphor bronze. It’s non-magnetic but still has a significant percentage of tin which is mildly magnetic… I feel like neodymium could induce?
There are also nickel plated JST terminals in some sizes that are as cheap as everything else, you just have to seek them out. I feel like those would work as well