chuck n duck vid request (big wood)

[no tree to big]

I have a guy basically trying to give me a older vermeer chuck n duck looks great not alot of use but has someignition issue, no biggie, so I cant test it out. when I search vids of these beasts chipping all I can find is some guy sticking twigs in them 2-3" max most of um are rated to 6" so what i'm looking for is a vid or even comments of general experience with chipping stuff 4-6"

thanks