I just heard from Odyssey. They really couldn't tell me to modify it, because they were the manufacturer. I get it.He did suggest that some people use 2 of the 'max slack' spacers together, and that's my next try. I have laser cutters, so I can cut a spacer for testing as well.
He also suggested that I just swap out my (assumed) 25T for something larger. I responded that I have a 20T, so I suppose that's amplifying the issue.