Any luck yet ?
I deal with these things all the time I work on German made printing equipment and the engineers love to use taper pins because the machining aspect is relatively simply=cheap as things dont have to be indexed prior to assembly.just assemble it in a jig drill hole ream it for the taper and drive the pin in while the metal's still hot .Therein lies the problem the metal cools and shrinks around the pin holding it tight. Sometimes we'll drill down the center of the pin to allow it to collapse a bit. But you've gotta go slow and be careful that the drill doesn't wander.Funny I had the same Idea about the C-clamp. Great minds think alike !