Now what about:
"When Mercury and Venus appear largest (ie closest to us) they have a shape like a crescent moon and are very close in the sky to the sun (they sometimes even transit).
ALL the other planets when they appear largest (ie closest to us) have a completely full shape (though most are too small to discern) and are furthest in the sky from the sun (overhead at MIDNIGHT)."
There's a much bigger difference between the pair Venus and Mercury and all the others.
What is the Flat Earth explanation?
You still ignore this vital difference! How can the simple size of the orbit ever explain this.
Just possibly if you would just explain exactly what the orbits of say Venus and Mars actually are I might be able to understand it.
Just giving the planes, radii and periods would be a start. It must be documented somewhere.