Recessed Light Trim

thingiverse

To cover up any unsightly gaps, size this appropriately to your application, render and print. Depending on how you intend to attach it you may only need 4-8 magnets per ring (http://www.homedepot.com/p/Magcraft-Rare-Earth-1-8-in-x-1-16-in-Disc-Magnet-100-Pack-NSN0566/204721213), but I put holes for 32 for good measure. You can always reduce those or just skip some. I intend to use a paste laced with iron filings and I haven't tested its effectiveness yet. Also I didn't look up the correct spelling of "soffit" before naming these files. You can generate a new cross section using the provided php script. Be sure to manually add endpoints that will yield a flat bottom if your equations don't yield such naturally, 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 whole ring, a split ring, a sample piece for checking that the width is sufficient without wasting too much plastic, and a pair of sample pieces for checking that split rings correctly interlock. 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.