When you're keeping a monthly comic book on schedule, there really isn't an opportunity to "redo" pages. On the other hand, if you have serious doubts, there is a window of opportunity to change your mind. Sometimes the window was a little wider than it was at other times:
RICK'S STORY page 164 -- Too comedic. Having developed this really ominous tone over the previous two pages I was in danger of frittering it away. As you can see it took me a while to figure that out.