It's split into eight sections (three segments on each side attached to the codpiece and tushplate, all of which slot into each other) with a channel running through all of them for an 1 1/2" strap. I used an elastic strap anticipating that an ab wrap is going to add some bulk around my waist (I'm a size 34, so at 100% scale it's got a little bit of room).
There are a lot of contours so I did split the larger pieces in half for easier printing (and minimizing supports), then welded them together afterwards.