• [ModuleCargoPart] packedVolume = 1100
• [ModuleCargoPart] packedVolume = 1200

per @OrdinaryKerman

That's about 10 times too big, did you accidentally add a extra 0?

discuss here #9

the parachute is ~0.3125m high and is 0.625m in diameter.
volume of a hemisphere equation:
2/3 𝝅🥧 (r^3) or something like that = 0.095873799242853 * 1000 rounded up for the antenna is 100.

V = (2/3)πr3

the cargobay is ~0.4m high and is 0.625m in diameter.

volume of a right cylinder equation:
𝝅🥧r2h or something like that = 0.12271846303085 * 1000 rounded up for the heatshield is 125.
V = πr2h