A very simple adapter to mount a mag-lite with 57 mm diameter to the gbeam. The mag-lite is not that bright as the recommended torch - but I had one and so it was an easy way to experiment without buying a new lamp. The adapter gets tight, when you screw it on. But be cautious: There is no rim or so, it´s just the friction that holds the torch. If you want to be shure that it dosen´t drop out, add some adhesive tape.Mine printed well without support. Added the freecad-file so you can change it.