Need a little help with a mod

[Gruffys]

I've been trying for a little while to change the placement of crystals in the game. I would like them to only spawn inside caves and not on the landscape does anyone know which MBIN files I need to change in order to achieve this?

 

I have already done some tinkering with the Cave and Crystal files inside the \METADATA\SIMULATION\SOLARSYSTEM\BIOMES\OBJECTS folder but wasn't able to see any change in game.

 

On a side note if anyone knows where to find the spawn distance value for patrolling sentinel drones I would be very appreciative as I've tried and tried to find a way to get them to spawn further from the player with no success.