Measured the rails - the biggest is a straight piece - no base plate it weighs in at 100Kg per meter the other is a short piece welded vertically to a base plate and weighs in at 40Kg per meter. The big piece is 85mm across the top and too big for a digger weight as there is only 75mm clearance between the tines. The small (and the one I use the most) is 65mm across the top and perfect size to make into a digger weight. - now to go searching.
