Recessed Light Trim

thingiverse

To disguise any unattractive gaps, adjust this accordingly to your application, render it, and print it out. Depending on how you plan to attach it, you may only need 4-8 magnets per ring (check out http://www.homedepot.com/p/Magcraft-Rare-Earth-1-8-in-x-1-16-in-Disc-Magnet-100-Pack-NSN0566/204721213), but I drilled holes for 32 just in case. You can always reduce those or skip some. I intend to use a paste mixed with iron filings and haven't tested its effectiveness yet. Also, I didn't look up the correct spelling of "soffit" before naming these files. Use the provided php script to generate a new cross-section. Make sure to manually add endpoints that will produce a flat bottom if your equations don't naturally yield one, like I did with [-12.75,0] and [13.5,0] at either end of the path. I've included the means for generating a complete ring, a split ring, a sample piece to check that the width is sufficient without wasting too much plastic, and a pair of sample pieces to verify that split rings interlock correctly. You'll need https://github.com/openscad/scad-utils and sweep.scad from https://github.com/openscad/list-comprehension-demos to use these scad files.