Working on a 78 SE picture one showing "survivor" tank mural, (not to my taste), I replaced the gas cap lock cylinder and reassembled same to reinstall. Several attempts ended with the catch positioned wrong so that the key would not turn, as in picture two, right side. Finally I got one together that worked, picture two left side, and on further examination saw that in addition to the difference between Standard and Special caps, the catches are different, picture 3. Is there any shop best practices on putting these together so they work consistently, other than ensuring that one type is never mixed in with another?