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I have a 1oz and a 3oz. I use the 1oz most of the time.

The large beehive collars have a smaller beehive that goes underneath.

The trick with pinning is lots of light taps, not heavy blows

Yeah, as I said, you have to do a little searching around on their website as it is not extremely intuitive. Here is the link to horn slabs
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I know he's on the other side of the border but buy the pins and collars from Austin. If he were in Katmandu I would probably still buy from him. I don't know of any sellers in Canada but I buy horn...