fwiw I have a rowi mini-clamp and it is so lightweight but still strong. Has the 1/4" thread on top. I don't remember if you remember seeing it at the allmans at darien lake when that guy with the stealth mics clipped to it. But depending on how long your extension pole is it should work, plus its a strong mofo, was able to hold my 391's/c1000's plus a vert bar no problem.