SummaryLumiDomes are terrific ball-shaped 3X magnifiers that are useful and fun -- they're great for the kids, too! What I particularly like about them is that you can view a much larger area without moving the lens than you could with a regular magnifying glass -- you do have to move your head around, but the magnifier can be held in the same spot and does not need to be rotated. You can get the 3-inch version from RadioShack for about $6. I made a stand to hold my dome so that I can use it for quick soldering jobs on tiny components.InstructionsI printed this on my acceleration-enabled ThingOMatic in PLA at 70 mm/sec, 0.3 mm layer height, with 3 extra shells. You will need to gently press fit the dome into the holder, but it's a loose enough hold that you can remove the dome when you're finished. LumiDomes are available from RadioShack: http://www.radioshack.com/product/index.jsp?productId=3353492