You are all a mine of information, thanks! I'm trying to do exactly what Sabian92 is trying to do, I bought the same tool and watched the video on you tube by the manufacturer, Park Tools. I can confirm it does not work, with or without the round bit Phil has mentioned. I have also read carefully all of Phil's instructions - they are the same as the manufacturer's
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still the thing is not shifting.
Have not tried hammer and boiling water yet, I think I will go to lbs first, with the frame, see if they can remove this resiliant crank. Btw, I have almost stripped the thread of the tool's nut that you are supposed to turn to loose the crank.
Now, I'm all for running to the lbs, no expenses spared, but mine does not carry much stock, plus they keep erratic hours, and I work shifts, can never get to them when I need them.
Also, they made it clear they are not interested in rescuing my old banger because it is not cost effective. I don't hold it against them, in fact they sold me a new bike, but I will not surrender my project, because it helps me learn my mechanics and also because that old frame fits my wee legs to a t, better than my new ride.
Keep going Sabian!