Scubapro O-ring tool (MK7, MK5, MK10, etc)
thingiverse
This tool makes it a lot easier to install the internal piston o-ring on the Scubapro first-stage regulators. Please note that you will also need a bullet tool when re-inserting the piston to avoid damaging the o-ring on the sharp piston edge. Scubatools.com has this tool and a lot of other good tools as well as a tool similar to this one if you do not have access to a printer to make your own. I have their Scubapro universal tool and it is good. It seems better than the one from Scubapro actually because it's solid brass rather than plastic.
With this file you will be able to print Scubapro O-ring tool (MK7, MK5, MK10, etc) with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Scubapro O-ring tool (MK7, MK5, MK10, etc).