I have a 97 Jamis Aurora with an RSX 3 x 7 drive train. I want to gradually rebuild the entire drive train. I want to start with the crank set which is now 46/36/26. I want to go to a 50/39/30. Problem is, I can't get the crank bolts off to see if the spindle is square or another type. The BB seems fine. I have the correct size allen key, but I don't think it is torquey enough. Any help will be apprciated.