DICE Logo

This is a logo of one of my buddies companies that I think is pretty cool. I've also engraved this logo onto some business card holders with a CNC machine I have. It was my first real tracing type design in blender. I was having issues with the blender stl model getting the plate to be seen by Slic3r. I'll describe best I can and maybe someone can shed some light on why I was having issues. I created the DICE logo with bezier curves in blender and then just extruded, which seemed simple enough. At that point I had an extrusion of just the logo and that model exported fine. I wanted the logo to be on a plate so I can use it for a keychain so in blender, I just used a cube and transformed it to the right dimensions to create a plate for the logo, then positioned it so it was intersecting the logo. From that I just exported an stl model. I looked at it in meshlab and it looked perfect with the plate, but then when I bring that same stl file into Slic3r the plate was missing. Not