Hello all. I’m new to the 3D printing world and am working on some practice prints with some of my own models. My issue is that a specific little car part model of mine doesn’t want to print with the hole in the top, it instead wants to make the top completely flat.

Here is my model:

https://s18.postimg.org/af9ioaqqh/image.png

Here is what Cura thinks it should print like:

https://s18.postimg.org/7xxrh4u09/image.png

I’m thinking I might have to split it into top and bottom, but I want to see if I can print it all in one go first. Any insight on this would be appreciated.