I have a migmate super, (£10 from eBay) and am in the process of getting it into a decent state to weld with. One of the wires to the black high/low switch had snapped inside, so i thought I'd fix it. I opened up the insulation with a Stanley knife and this popped out.
I think it's from the 80s when asbestos was still legal but not in such friable forms, but still. Anyone know for sure if it's fibreglass or not?