Looking to carry more than 6 rounds in the magazine. I have the S&W 7 rounder, but the extension on the mag makes it harder to carry concealed. I know about Mag guts, but they don't offer anything for the .45 shield. Hyve and Striker seem like they will make the mag longer than the S&W 7 round mag. Do I have any other options? Is there a spring I could use that would give me the result I need without having to add so much to the base plate?