About 70mm cells: I don’t know where to find them… hope someone else would chime in and help in this task!
Trailer: even if I’m aware that colors are (almost always) not the “right” ones, I prefer it, color wise.
Latest regrade: it’s nice, I like it, but too dark… try to use the BD luma “as is” - I often use this “trick”, as many BDs use the original negative as master, so colors could also be messed up - due to the technical problem to render color timing using digital manipulation, and/or deliberately revisionism… but it is supposed that contrast should be right - more or less…