Thank you both for your responses. It would be great if they have key ways. I am not. Sure at this point as I have not gotten the parts yet. As for the picture taking, I will do that, but I am not positive at least one of the sets, is in the proper position. One of the gears is missing some teeth and its mate the teeth are stripped. Again if they have key ways this would be great. Do either of you, recommend removing the column for this work or can they be exchanged while the column is still installed?