This site has some more info about the 777 etc. Some articles may be paywalled though. https://leehamnews.com/2020/01/25/third-time-is-the-charm-777x-takes-to-

This site has some more info about the 777 etc. Some articles may be paywalled though. https://leehamnews.com/2020/01/25/third-time-is-the-charm-777x-takes-to-the-sky-today/ https://leehamnews.com/2020/01/25/third-time-is-the-charm-77...