anxiously awaiting arrival of the sleeve for the series 69 mag. followed yz's prompt and installed +10 wolff springs. really happy with the added length this mag. brings to the grip. cdnn description "s&w factory demo w/finger rest" was right on the money except it looks brand new. if kt would make a single stack utilizing this mag. length i think it would be a winner. the mag. snaps solidly into the gun and ejects smartly loaded or empty. springs stiff at this point and last two rounds push back when filling it. a couple of reloads and i'll have a thumb like a gorilla! i feel they'll lighten up with use. ordered mag. and springs on a friday morning and received them the following monday. ordered the sleeve tuesday so hope i'll get it this monday.then...........OFF TO THE RANGE! i'll probably shoot all 10's at fifty yards with my new improved grip! i'll let you know how it feeds and functions shortly.