Anyone familiar with this older stihl brush cutter? I've been looking for a pro brush cutter for some time now. Considered a Stihl FS560 and Husqvarna 555fx, but the price on both is pretty high. I recently ran across an older Stihl FS410AV for sale, the powerhead looks like an 041. Anyone have any experience with this model? Price is MUCH more reasonable ($400). But I worry about parts availability like the drive shaft, gearbox, etc. Any input from anyone would be greatly appreciated.