I don't think the sky stone chests currently use a proper loot table so it is not possible to customize what can be found in them.

I'd like to try a play through where scraps of AE components can be found in sky stone chests so that one can begin piecing together a small network before finding all the inscriber plates but I'm not sure how to get that to work.

Would it be possible to either modify the mod to allow using a loot table or more likely could someone point me in the right direction to make necessary changes for just my play through?

Thanks :)

never mind I found the place:

I'll try to figure out how to do it myself.