I bought a Stihl FS130R string trimmer and while it's a good machine, I really could not stand to use it. It's one of the most unwieldy and unbalanced contraptions that I've ever paid a bunch of money for. A buddy of my bought a FS130 and thought the same thing. The only difference between the machines is that the "R" comes with the hoop handle and the "non R" comes with the bicycle handlebars. We decided to swap some parts around.
Here's my stock R and his handlebars
Here it is after I used it for 2 hours today
It's a whole new machine. It's balanced, it's not awkward and the only reason that I stopped is that the single shoulder strap leaves a lot to be desired support wise. I was seriously considering selling it and getting something else. It's a keeper now and I'm shopping online for a full harness and brush blades.