I know that pretty much everyone (including myself) only uses a trimmer for edging their lawns/commercial properties, but I am finding that I need an edger for cleaning up jobs before I do them regularly when the lots are neglected for a while. Anyway, I already have this old Ryobi trimmer that is attachment compatable and I was wondering if I got a edger attachment if that would be powerful enough for edging places that have grass growing over the curb and have dirty filling up the space where the rut should be. Or should I try to buy one of the old really powerful/bulky edgers? I won't need this unit very often at all, perhaps once a week or less. I just don't want to spend much money, and ebay has a bunch of Ryobi attachments for about $30 or so. What do y'all think?