It's not a bargain if you have to grind off 1/4" of each blade to get them to fit. Somethings are just not worth getting the cheapest possible deal on. I 'm thinking that you may save 1/3 the price of OEM blades somewhere, but end up with inferior steel that requires constant sharpening, possibly even straightening to maintain balance and quality of cut, eating up your time. My 20-30 year old machines get factory blades and filters because it ain't worth it to me to risk damaging high dollar components with possible inferior or non-spec parts. Just my opinion for what it's worth.