Fist is your and second is mine correction
1. Look how the level elevation have to be calculated.
2. The level height is not the same thing with walls height which could be different.
3. The left wall of the ground floor have 89" in place of 88"
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A computer program does what you tell it to do, not what you want it to do. Murphy's Law
When all else fails, read the instructions. Murphy's Law
If you don't like "AS IS", DIY. Dorin's law
