Just curious as to why bob's crimpers wouldnt work?
http://www.therealbobroberts.net/ht1921.html
Honestly, if you do a lot of crimping those work like dog-shit... The quality of the crimper really comes down to the sizing and shape of the die:
A good die looks like this:
notice how it comes to a point on the open end... that's what curls the pin casing back into the strands for a really strong and electrically sound crimp.
Also getting one with a double-hing so the die closes flat instead of on an angle is preferred:
crimpers like the one Bob Robers sells are really cheaply made and don't have a good die so the end up just squishing the shit out of it, which "works" but it's not going to hold up in the long run. I do a lot of crimping for custom automotive electrical and poor crimps usually rear their heads and start causing problems within 6 months to a year, they just can't hold up to the kind of vibrations they get in that environment. using that in an Arcade machine will probably last longer just because it's not seeing as much stress, but if you're going to do it, do it right.
90% of the time when I have friends that come to me with electrical problems in their cars it's because they installed a stereo, alarm, or something else with shitty crimps.
You don't have to pay a lot for a good crimper either I paid about $15 shipped for mine (I forget the model but it looks like the blue one in the pic above), if you're doing this kind of stuff all day, spending the money on a really nice one (usually in the $80 range) will make a huge difference, and it will allow you to get the work done a lot faster too. because they'll have features to line the pin and the wire up perfectly and easily every time, reducing the potential for error.