Any chance of this rolling again? I would take 10 or so for G250/v and R395 if they fit.
How about a Spline Wrench you can makes as many copies of as you need?

ScubaPro Spline Wrench - Open and closed ends Remixed by awkward_swine MakerWorld: Download Free 3D Models
Boost MeHelp support my 3D Printing habit with a Boost! It's greatly appreciated. Several ScubaPro 2nd stage regulators include a “spline nut” on the regulator body. The spine design is supposed to with temperature regulation, but it also makes it difficult to remove or replace without...

