Fill Types On Place-able Silos

[HuskyFarmer]

So I'm building a placeable Silo pack.. I'm looking for a way to make the fill types function more like a trailer... IE once you put one fill type in you cant add another, but once you empty the trailer you can add the other fill type... the current scripting that I know of doesn't allow for this option and I was wondering if there is a way to make this work...