well if you use a flash flipper you clearly need a short extension...I have been using the Yongnuo SC28 ..this has the locking catch which my wife keeps knocking to unlock ....She complains flash not always working ( Well I told you dear ..... ) so I purchased a Neewer SC29 and it has a great tamper proof lock and surprise surprise a built in Focus Assist Light ...all for about $15 ...We will give I the wife test and let you know.
PS Now I am asking myself when does the light come on?? do I have to have a flash connected or even switched on? and will it work with my SB 400? Not much sense on the Google