Stick with them, leave the steel splitting wedges for splitting. As to the soft metal wedges you mention...they are not (or were not when I was a working faller) aluminum...that would be too soft to drive more than once. Instead, they are a magnesium alloy, by slang term mags. Their profile is no different than hardheads or plastics; not wider, not steeper. Don't mess with success .I have K and H and STIHL wedges ... I like both !