Any updates on this?
This project was scrapped. It was actually week before last that I finally decommissioned our test Railgun server.
Cloudflare promised me updates in April to fix the issues I found - and those updates never came. I bet it's a dying project they'll just let dwindle away since from both a hypothetical and reality standpoint it simply won't work with the way they've built it and this is what I pointed out to them only to be stonewalled.