Not at all. It just lends itself as a mold by default. It happens with many things that are built like this. Part of why it is great to make these things!
I do not know how you measured the internal volume? Fill it with beans? Most engineers can click this out on a computer in a short time these days.
I am an electric engineer,assuming I use a program (CAD ),entering data into this complex, incorrect form would take me a very long time, effort which for single production makes no sense..
The making every detail is unique, It is normal to have differences between them.
When assembling the structure, i do extra work in the interior of column, which changes volume.
It's clear that the software will not help me,mathematics - as well.
I'm trying to get closer to her alternative - the egg, so I solve the problem /as possible/with Fb ,Fc. My project is at an early stage and do not have , will not matter unless I get the right volume.
Yours assumption about volume measurement is а wrong.