I agree with the advice to get a lawn edger if you want to use it
mainly for edging. Troy Bilt makes a gas model with interchangeable
heads, one for edging, one for string trimmer. Don';t know if there is
a similar electric unit. An edger does a better job and is a lot
easier to use, especially if you don't intend to edge every week. I
do it about once a month.