So, a special crank arm removal tool is require. I don't suppose I can use or mod an old Park tool that was design for old fashion taper BBs for the spline drive set up? My DA is a double set up. Looks like I have run to a shop and get a tool. What is it that removes the crank in the DA? I usually just loosen the big Allen bolt and continue to crank and out comes the crank arms. This time, only the drive side of the 105 work that way. The Allen bolt looks different on the non drive side. It does not have the dust cap like ring with 2 dimples on it. Any ideas? I really don't feel like getting another tool, but look like I have no choice.