Did it once in unpadded leathers without sliders, went through to the skin pretty fast. You definitely want a thick block of plastic if you're putting any pressure on.
Naah - you want some of those metal sparky ones so as you can set light to some spare leakage while you are at it.
Naah - you want some of those metal sparky ones so as you can set light to some spare leakage while you are at it.