i see.There IS a difference between jigs.
The purpose of the plastic is to prevent user from destroying their Joy-Con slots.
I'm speaking of 1/10 of a millimeter precision.
The plastic should be made that way so the wire should only touch the pins.
If it is too short, than there will be no short circuit at all. If it is too long than the wire can wear off the pins over time and ultimately destroy them.
The wire should not cut and should not wear off Joy-Con slot pins. Which means it should be curved at the same angle as pins are.
Also it should be made of soft metal like cooper or ideally it should be gold plated.
I have seen many jigs that use straight steel wire, this is good example how not to make jig.
but none of them i have seen used soft metal.
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i doubt it...
images dont match in the preview...