Ceiling mount for 10.75" speaker

I was asked by a friend to create a ring that would guide his drywall crew to precisely position his home theater speakers. Since the speakers are exceptionally large (10") he was unable to locate a suitable mounting ring at a reasonable cost. The ring as posted will provide a 10.769" guide hole for a 10.75" speaker frame. The [metal brackets](https://www.amazon.com/Broan-NuTone-HB4-Hanger-Ventilation-4-Piece/dp/B000NCTFJM/ref=sr_1_45?ie=UTF8&qid=1498766848&sr=8-45&keywords=ceiling+hanger+bars) were ordered online. Overall cost was about $10 a frame, probably less but I had a few repeats due to edge warping.

There are two versions of the large frame, sometimes the edge would lift during the long print so I added an 'overprint' area to keep things flat. For those of you lucky few who do not have the occasional lifted corner or edge I've included a stripped version of just the frame. I recommend printing the mounts vertically to avoid the need for support material that is difficult to