Got a decent deal at a car boot last week. Telwin buzzbox as new totally unmarked (not too bothered about that but it might come in handy), leather apron and gauntlets, 4 x magnetic clamps, set of self-grip clamps, 5kg pack of 2.5mm Draper Super 6 E6013 sticks ( only 4 used) and a boxed Starparts V1 Plus auto helmet and pack of outer lenses. All that for £80 from private seller and used for one job. The helmet mainly interests me. I haven't used it in anger yet but it's darkening instantly with the sparks from a lighter. Seems to sell online for about £50. Any known problems with this helmet?