So, what would they do?
remove Militia from the Second?
add cyberspace to the First?
Get rid of the Third?
Modify of a couple of others?
Wow, I can see you've given this a lot of thought, and spent a lot of time listening to people on the right on this subject.
What actually got drawn up at such a convention would depend entirely on who the delegates were, but there would probably be discussions about term limits for Congressmembers, balanced federal budget requirements, and voter ID requirements. Some other suggestions from proponents of a Convention of the States have included some form of flat tax, cuts to or elimination of federal welfare spending, and addressing judicial activism.