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veloham
@absurdbird
Finding a 7/8 punch looks not too hard. Maybe you can even find one to borrow.
Inside diameter of standard 28mm copper pipe is 26.2 🙂 I reckon that would punch through felt if you filed it sharp and hit it hard enough.
The internal diameter should be easy with punches you can get for leatherworking.
Do you think the washers rotate with the axels or the hubs or neither?