"How accurate would you need to be to tell the difference between 40,000 km and 62,800 km?"
Well you'd need someone taking the right journey with perfect knowledge of wind or sea conditions to begin with. It's not exactly a feasible distance to measure.
"What is the circumference of the equator on your DE?"
No idea, you have the same resources as me, you measure the equator, let me know what you find. You have to know how stupid that question is. I'm not going to blindly quote round earth belief, I'm concerned with fact, and I do not have the resources to map that out.
It's your model!
Look, we know the size and shapes of all continents and countries.
We know the circumference of equator of the real earth (globe, flat or egg-shaped).
We know the distance from the equator to the North or South Pole.
If your earth is a flat disc, its radius must be almost exactly 10,000 km.
How hard is it to work out that the circumference must be
2 x π x 10,000 km or close 62,832 km?
Or are you going to claim that all measurements of the earth have been made by these "Masonic Geodesic Surveyors", and so are all faked?
It does seem strange that whenever I have taken road journeys the distances given by GPS, car odometer, maps and road signs have agreed to far better accuracy than that needed here. I have travelled by road for many tens of thousands of km around Australia and over 8,000 km around the UK.
We are not talking about errors of ±0.1%! If you know these dimensions to ±10% (or even 60%!) you can prove one model over the other! This applies to your model and more so to the single disk FET.
Careful measurements of the earth can determine its shape, and if flat earthers would pull their collective heads out of the sand they would realise that we already have those measurements.
No, the maps we have now are quite accurate, and the agree to quite good accuracy with surveyed maps over 150 years old, so it's no recent "NASA conspiracy".
You do need to "get real" and stop living in your own little dreamworld!
Still, I guess everyone needs a hobby and it's better than robbing little old ladies!