Walther's Chip Grinder roof hole?


Well-Known Member
Working on building the Walther's Chip. I'm wondering what the whole in the top of the roof is for? (https://www.walthers.com/sawmill-outbuildings-kit)

I added the brace on the top as I have this habit of making roofs removable.
I don't know the kit, but my guess would be either a platform with some ducting, maybe a cyclone, or simply a 'doghouse' gable of some description...?
@santafewillie that makes more sense. I hadn't picked up on the. I thought it just went barely into the hole, but upon examining the photo on their website I can see that it extends up through the roof. Which would also make sense to have the walkway up there.