Initially, I got excited about doing what you did until I read your blog post. LOL. Yikes, that was a lot of work.
Let me ask you two questions. One, what is the length of your double crossover? Two, if you weren't trying to match up with a 2" on center double mainline, would the project have required so much cutting?
Oops, another question, Could you simply mate four Atlas Custom Line turnouts with a 19 degree crosssing without any cutting and, if so, how far apart would the parallel mainlines be from one another?
Rich