Please reread my reply. What you quoted removed the qualifier.
Tips on modifying a magazine is one thing. Getting caught in violation of your state and local laws is quite another and quite serious. Not counting the chest puffers, I believe that there are quite a few people who have read the modification without considering their laws and some probably believe that it's legal, perhaps condoned by the owner, because they've read it enough times in here.
To my knowledge there is one issue that hasn't been mentioned and that is the security of these forums. Admittedly, it's a presumption on my part and clarification would be welcomed by anyone in authority.
I don't want the forum owner to get grief from outside forces because they allowed users to post potentially illegal modification information. Perhaps avoided by users posting a simple warning to check state and local law. A little CYA in these matters might go a long way.
So, while you understand the potential risks involved and wanted tips to modify your magazines and that's marvelous, you are not my concern.
And, so there is no ambiguity, I'm not in any way attempting to tear you a new one. I'm merely stating what I believe to be a legitimate issue.