I use an electric to edge about 200' every week. Driveway, sidewalk and curb. It's called Black and Decker Hedgehog. I figured with price of gas, I'd worry with the cord for the ease of "pull the trigger and it runs". First one worked most of a summer and died. Took it to repair shop and asked how long it would take to repair. Answer was "10 seconds". Handed me a new one still in the box. Been chomping away for 2 years for $69.95. Neighbor used one that was on a trimmer. His broke and he borrowed mine. Bought one just like it the next day. The problem with the interchangeable heads on the trimmers is the shaft that makes the interchangeable. It's just not sturdy enough for edging IMHO. Neighbor's just twisted in half after 6 months.