I have a discrepancy between the rules and how armor is allocated for all the official planetoid designs and the spreadsheet follows the rules not how all the official designs work.
So what's going on, the rules imply, but do not actually say, you use the entire hull size to calculate armor, and the spreadsheet does it this way. But every official design that uses armor, for planetoid or buffered planetoid, uses only the AVAILABLE hull size to calculate armor. Examples are the Jaellemo Planetoid Monitor in HG22, p247, Neubayern Mobile Base, Great Rifts Book 1, p209 and Megusard Meson Emplacement in Trailing Frontier p233.
Can we get a switch or something so planetoid and buffered planetoid hulls only have to armor the available hull size and not the full hull size?