Pencil clip for 3 ring binder

This should theoretically print with no support and end up being a clip to hold pencils on your binder. I never liked carying a backpack so I just use a small binder and used to keep pencils in my pocket, but those damned things are sharp and WILL eventually stab you in the leg or crotch. This should solve all related problems. Will upload pics as soon as it's done printing.

edit: So my first print didn't go so well because it must build a fairly tall tower only 3mm by 20mm and as it reached the top it decided to break off my print bed. I have now edited the openscad file to make the top round instead of square so there's no bridging to be done, and I've also added in some variables to try and make it a bit more parametric for your needs (future versions might use makerbot's customizer). I reccommend using a raft if possible. I would be, but for some reason SFACT has been giving me troubles in that area.

edit2: Alright so I've modified the openscad file to be a bit more parametri