What @NCL4701 said.I have the WC-68 with probably 60 to 70 total hours on it between me and my brother I share it with. So far it will chip anything that fits through the feed chute. Most stuff has been 3” or less but have had things up to at least 5” with no problems. I have yet to do anything in the way of maintenance other than grease it routinely.
Had the discharge chute clog several times chipping green sappy evergreens until I figured out the cause was operator error in not slowing feed speed for sticky stuff such as that. Have not had one clog since.
Woodmaxx is probably a good machine, just don’t have direct experience with them. Nothing but good things to say about the WC-68 and Woodland Mills.
I've had a couple different types of clogs in the chute, though. When the last bit of a piece goes past the rollers, it's no longer being forced into the knives and will actually start tumbling behind the roller. Obviously, the steel roller can't be allowed to contact the knives, so there in lies the problem. The large piece will get sideways at which point the knife will slice a very large chip with the grain, and that will get caught in the chute where it bottle necks just below the handles. Otherwise, I've stalled my LX a few times with it but was chipping stuff that was at least 5" in diameter. I have seen it hogging off 1/4 inch thick slices off elm and cedar nearly 4 inches in diameter behind the LX with no problem. It's rated for up to 90 HP, but I run it with 19. I've probably got about 50 hours total run time on it.
My worst complaint is coupling the driveshaft, but some of that is probably my fault because of my cheap quick hitch.