Anyone have experience with the FS561 clearing saw?

[SCMtnHaul]

I'm thinking of swapping out my old 545FR for a Stihl 561. Mostly I'm interested in how the 561 felt for taller users--I'm 6'3" and the Husky is a bit frustrating at times due to the short tube and handlebar combo, but it does work, barely. My second concern with the 561 is run time on a tank of fuel. With the 45 cc Husky I get about 40-45 minutes on a tank. Any problems with the Stihl clearing saws?