My '91 hammer and '92 blizzard both have serial number beginning with I and there are some atrocious welds on these, especially the hammer. They look cold and are lumpy as well in some of the hard to reach spots. On the other hand the '93 Edge which has a serial number starting with E and then an 0 and the rest ground off. Those welds look a touch hot in places, but clearly the edge was not made in the same facility as the other two.