I just received a few factory Glock +2 extensions and Wolff springs for my preban G23 FML mags and I have a question about the little triangular part that fits inside the extension. Is this piece only used with FML mags? Do I have to remove the internal plate on the bottom of the mag spring to use these extensions since there is no hole for the locking tab? I assume the answer is "Yes, you idiot," but I wanted someone more knowledgeable than myself to verify that fact. To clarify, I don't need verification of the 'idiot' part. My wife has already confirmed that fact. Thanks.