That’s not an answer. “Go ahead if it works”? Please don’t go to posts and respond with such useless non-information. All you did is reduce the chance of someone that does know the answer from looking at this post, since it now has a response.
And there’s nothing sneaky about it, it’s actually the opposite. I have duplicate content on the 3 old pages and want to not be penalized for that, so I want to make one page. What you suggest seams the exact opposite way to go.