Forgive me for butting in on something I know nothing about, which is why I hadn't looked at this thread before, but, in an idle moment....between chapters in "The History of the Col. Stephens Railways".......
don't the .1 & .156", as stated for Molex on your link site relate almost exactly to blue and yellow automobile connector crimps. Don't tell me otherwise, because I took my 6" school ruler to B & Q yesterday, and measured their crimper at £5.99.
Surely if you're not commercially repairing pinball machines, but hope to make each connection only once, it would be worth trying that and saving the expense, you can then as Andy suggests use thin nose pliers for the restraint, which is all i've ever used.