while creating a std. c'sink hole( thro' tool menu )suitable for a particular bolt dia./thd it sets a default hole dia,depending on type of clearanace selected(H12- fine)etc.and sets default c'bore angle and dia,while hole dia. changes only acc. to type of fit selected and won't allow changing itwhy does it allows one to change c'sink dia and angle?? that too without any warning or sub menu ,because if these can be changed it will not be acc. to standards?? am i wrong somewhere or is there a setting for this?