This is a re-upload, the initial upload is on my co-worker's account, which we made first. This is relisted for greater accuracy in terms of tags and things. Also, yes I designed it, I'm not stealing it, and he's welcome to keep it up on his account too.

Edit: I was inspired by a derivative, and realized there is a need for a bottom row of scales without bottom holes (good call). I've added a model for that. It's not perfect, but the file originally came from sketchup... so not easy to edit.

Note: Lay them flat, the model imports standing up, that's silly - they'd be super weak if they printed at all.