Eric -
It is my understanding that the bx42 is shared engineering with the Wallenstein among others. BUT I don't think it's been definitively proven, at least, I can't imagine the company would deliberately confirm that.
Also out of curiosity, how do you use yours? Do you go out and periodically chip up some fallen/cut debris? Do you make piles and then go on s chipping spree? The reason I ask is that I typically will trim a hedge row over the course of say a month and get a huge pile that includes everything from sticks to nearly 12” diameter logs. All of this goes into a pile near my garden beds arranged in such a way that I can situate the chipper in such a way that I can simply chip wood right into the desired bed.
We live on a ridge with 5 flat acres of land. 2 acres of this was a dense sumac "forest". I started there, cutting the trees at the base just before running hogs through to tear up the roots. The sumac grow very fast but don't get much more than a 3" in diameter. So I cut a pile then
feed through chipper. But yes, the rest is just downed wood that I cannot use in other ways. I pick out the pieces that are useful to us in other ways (carving,
firewood, smoking, building) and the rest goes into a pile as near to where I want to use the chips. If it's not close, I just chip onto a tarp and drag the tarp.
Since I am collecting a mountain of chips, I need a big chipper to go through the pile expediently. Also, those 12” logs just plain need a big chipper in order to take them in the first place. And one of those logs will produce a LOT of chips. Right now I have 3 waiting to be ground up (they were all hanging deadfall that I wanted out for safety reasons.
This size log would require a commercial grade stand alone unit. I'd probably recommend renting if you absolutely need to chip something that size. Obviously, something that size creates some serious hazards as well.
We considered renting but the cost of renting was more than having a load of chips delivered plus we're an hour or so from the rental place. I considered also many of the more
sustainable uses for the downed wood that Paul and others mentioned above (we do use wood for heat, building structures and fencing,
trellis, carving, smoking etc.) but we also need the chips for mulch,
compost, pathways,
mushrooms and more. Eventually we will
transition away from chipping but right now, after much research and considering the other possibilities for reaching our goal, this seemed to be the right solution.