If a chipper is the route you wish to take, I wouldn't even consider a stand-alone unit. Get a PTO driven unit for your tractor. I've worked on just about every brand of self-powered, as well as PTO driven chippers, and in my opinion the self-powered units are little more than toys. If you intend to feed it a steady diet of anything much bigger than cornstalks, you will be disappointed. PTO is the way to go.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.