Hi Ben, I really appreciate the information you've gathered and shared on your site. I've spent a good amount of time trying to ensure a reasonably smooth visit to Paris in July 2020. May I contact you with specific questions about our itinerary - the parts where I have outstanding questions about transportation? I can pay a small nominal fee for your advice. Please email me back to let me know if this interests you. Thank you from Canada.
You can find my direct contact info on the about page and let me know about your itinerary questions. If I'm able to provide some worthwhile advice you can find my donation link on the about page as well.