(Sorry if this has been answered before!) I was wondering where the sacrificial slabs actually are inside Derse? Because in [S] Wake. you can clearly see the perspective camera zoom into the main part of Derse (Then to AA on her slab) after Jack starts blowing it up. But in [S] Cascade. Rose's and Dave's slabs are clearly shown to be within the moon of Derse? Is this just some crazy plot hole we should ignore or is there a logical explanation?

They are normally in the moons of Derse and Prospit. Aradia was just a special case, probably due to her having been dead before she started playing Sgrub