What is the difference between having a curved shaft edger vs. a straight shaft edger? I burned up my edger today so i need to replace it asap. I knew it was coming so ive been doing some shopping around lately and have been leaning towards redmaxbut am still open if anyone has any suggestions. I called the dealer today and got pricing the only difference b/t the two 2500 series edgers is the curved or straight shaft. SO what the big difference with it being straight or curved..... in price its only like $40 ... no big deal.... just wondering before i made the purchase.