1/2in J Channel Drill Press Jig Pixel lights
thingiverse
This is my design of a 12mm pixel light jig. This 1/2in J channel from Home Depot fits my soffits very well. https://www.homedepot.com/p/Ply-Gem-1-2-in-x-1-1-2-in-x-12-6-ft-White-J-Channel-VJC0404H/202666294 This jig is designed to work with a 15/32in drill bit. You may take a few shaves of PLA off on the first couple of holes! I printed this on its side with the holes facing forward to print without supports. I also printed a 12mm dowel to align the previously drilled holes to the next one. I found that on Thingiverse, however I do not remember the creator, I apologize! I have also uploaded a smaller STL that can be printed to see how it fits your channel before spending a few hours printing the full size one. Just rotate it in your slicer so it lays flat on the bed. I printed this a 10% infill just for testing. I have added a picture of the final print sitting in the orientation that I printed it along with a picture of it clamped to my drill press for clearance and depth measurments.
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