Hello there. This is my first time here so I hope I've posted this query in the correct place. I'm building a 3D model with individual components that fit together once printed. I'm unsure of the best way to describe it, so I have included this image for illustration purposes: As you can see, this cuboid has a cap that slots into it once it's 3D printed. My question is, will they fit together if the edges are the same size (in this case 6mm and 24mm), or do I need to make the cap slightly smaller? if so, by how much? After all I don't want it to be loose, but I also need it to fit nicely. I figure it may be fine if a bit of force is used as it's being printed in plastic here at Shapeways. Thanks guys.