@-JD- is way fancier than mine, but mine cost about $1.50 in parts and has held up for over a year. The 3D part is like .15 cents in material.
I have made 2 so far, this 1st one is PLA, it cracked but I saw it slowly happening over time. The newer one is PETG (which is the same stuff as water bottles). It's holding up really well, no stress or cracks at all in over a year.
For a while I was nervous so I had a compass on a bungee on my left arm that I would attach the boltsnap to, so no matter what I wouldn't lose the light.
I have made 2 so far, this 1st one is PLA, it cracked but I saw it slowly happening over time. The newer one is PETG (which is the same stuff as water bottles). It's holding up really well, no stress or cracks at all in over a year.
For a while I was nervous so I had a compass on a bungee on my left arm that I would attach the boltsnap to, so no matter what I wouldn't lose the light.