2nd Stage Adjustment Tool (updated)
makerworld.com
I updated my 3d printed 2nd Stage Adjustment tool to make it smaller and add alignment marks.
Lines on the knob at the 0, 1/16, 1/8, and 1/4 positions make it a bit more precise when doing fine tuning of the orifice.
I print up a batch of these once in a while for my Save-a-dive kits and fill up a zip lock bag full of giveaways. Every time I end up adjusting somebody's regulator at a dive site, I pass a few out with some basic lessons.

Scuba 2nd Stage Adjustment Tool (New!) by awkward_swine MakerWorld: Download Free 3D Models
Boost MeI you like this design please send a Boost to support my efforts. It will be much appreciated!This is a handy tool that is used to adjust and tune a 2nd Stage Scuba Regulator. It is a customize screwdriver like tool that perfectly fits into the barrel of a 2nd stage and engages with the...

I updated my 3d printed 2nd Stage Adjustment tool to make it smaller and add alignment marks.
Lines on the knob at the 0, 1/16, 1/8, and 1/4 positions make it a bit more precise when doing fine tuning of the orifice.
I print up a batch of these once in a while for my Save-a-dive kits and fill up a zip lock bag full of giveaways. Every time I end up adjusting somebody's regulator at a dive site, I pass a few out with some basic lessons.