Yes, the grill is exactly what i mean, but here's my problem. There's basically a lot of faces that would need to be created there to get all the detail in. Now, from what i've seen, when working with subdivisions it's a pretty bad idea to not have quads just about everywhere on your mesh. Thus my problem. If I add all those faces there, i have to add a whole lot of faces elsewehere and what's more, since the detail is no longer uniformly added my subd also takes another shape. My idea was to just leave a big square there and add the details on a different subd surface that i would then just insert in there. And i did that, as you can see in the image below. But as you can also see in the image below they're not joining too happily (there are some discontinuities in the vertices around the box and also near the adjacent hole). So that's my conundrum.