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IWISS SN-2549 Crimping Tool Instructions
Because I needed to know which of the four dies in the jaw of my IWISS SN-2549 crimper was the right one for 24 AWG ribbon cable:

IWISS SN-2549 JST Crimper Manual It turns out either of the two middle slots should work, but the crimps look better in the smaller one.
Admittedly, the instructions are thin on technique, but I only wrecked four pins while retraining my crimping hand. The key trick is indexing the insulation fingers on the step inside the jaw, thus putting the socket box or the male pin outside where it won’t get smashed flat. Squishing those fingers from their normal splayed condition into a rectangular shape helps fit them into the jaw against the step.
Living in the future where the right crimping tool doesn’t cost five Benjamins is great …