Ouch Jon. btw, I've been doing some serious thinking and have considered if you clean up your yard, I would then give you $50 for that machine!
Free-99 is an excellent price on one of those! You got the most important bit down already, none of them work well with dull knives!
Yeah, you suck! I'd like to get my hands on something like that. I do have a decent place to burn but I'd rather mulch the brush and fill some spots on my trails.