Ok, guys, bear with me. I'm going to ask one more stupid question. The last major piece of equipment I need to buy is an edger. Probably won't use it a whole lot as edging seems to be a non-discovered art around here, at least on lower end residential work, and from what I've noticed, most commercial as well. Using one might get me one up on some of the lowballers in the area. And, yes, I know you can edge with a trimmer, but after doing so myself, it generally looks considerably like something done with a double-shovel plow. Anyhow, straight or curved shaft? Dealer recommended straight, but I noticed a thread or two where the comment was made it is a little easier to use the curved. Merely a personal preference, or is the straight shaft more reliable/trouble free? Thanks.