This is one of the options I am considering, testing showed that it should work. The issue with this option is that it will not stand up with only 2 bends and becomes either a U on the desk or a very award shape that does not balance.
The readings turn out close enough to calibrate though.
Ok, I think we just figured out the issue and the good news is it is semi-easily correctable.
The 4” only has an adapter that steps down to 2”, I need another adapter to step down to 1.5”. This adapter was the issue. After modifying it so it does not shroud the meter as much the readings are right in line with what I expected them to be at the start. I never would of guessed that little bit would make such a large difference.
So now to start building the 4” and hopefully finish those today and start shipping tomorrow.
After another marathon sphere building session with the whole family helping out we managed to get all the spheres built, calibrated and packed up. Tomorrow I will start the shipping process.