Awesome mate! Really nice pieces! I've made a few adze blades using old leaf springs, i'd guess the steel wasnt heat-treated properly? Or perhaps it just wasnt leaf spring. Unfortunately i've run across a few fair trade products that arent made of the steel they say they are, including a small adze... It had cruddy edge retention, so i chucked it in the forge and rehardened it, except it didnt harden. I suspect it was probably made from standard 1018 steel. I also cant understand why they'd cost that much to buy, the few i've sold i do for $50AU... Then again, i dont have a big name for myself, so maybe the price is in the name of the maker? :P