Comment
Made this bird nesting tool, just a couple of bits of suitable angle iron clamped together in drill vice then drill the small holes slightly smaller than your cable diameter followed by a 5/16"th drill drilled about 1/4" depth. To make the punches I used 5/16"th stainless rod again centre drill for the size of cable as per clamps followed by 5/16"th drill to form the concave end ( I also ran a knurling tool on hammer end as it makes it easier to hold punches).Just clamp cable in angle brackets in vice just proud of the top then insert punch over cable and whack with a hammer....job done..
