Hi guys sorry for the late response, had some network problems.
We're using a ZPrinter 250 which uses an application called ZPrint to process the Models. We've been using .stl's to import drawings but that was importing them from Solidworks which I don't have a license for.
I found a plugin that allowed me to convert the .skp file to .stl and then import it into ZPrint which I will try out tomorrow if I have time. It's a possibility that ZPrint will alow me to dictate the interior of the model because previous models where developed entirely solid, and to save materials they where created with small Columns automatically (They where originally designed entirely hollow).