julianthegypsy
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- Cirencester
Claas combines were stuffed full of gib head keys years ago and they did sell drifts for removing them that looked almost exactly like that drawing. The sides weren't parallel either, but slightly wider at the base, designed to be used one way up only. They sort of worked, but it was still a nightmare!Only one I've seen was handmade. Don't think they were ever a manufactured item. I borrowed it from a friend.