I'm playing around with a couple of mods to see what can, and can't, be done with regards to scaling. And using the mod 'Awakening of the Rebellion' I've scaled the Executor to 10x it's normal size.
Is there anything I can edit, beyond <Layer_Z_Adjust>, to put the Executor right at the bottom of the map... So despite its huge size its sits below all other units? I've tried editing <Layer_Z_Adjust> with absurd numbers (-200000), but evidently it has a cap, and that cap still puts it right in the centre.