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I use Atomic regs with the seat-saver feature, and they are supposed to be rinsed under pressure. I always inform the DMs and crew that I want to change over my own tanks and that at the end of the dives I need to rinse the reg under pressure. Since I now dive mostly with the same outfit they are getting used to my situation, but at first there was a little pushback when I would dunk my reg, bcd and tank into the rinse barrel before disassembling. Before disassembling, I blow air out the regs to get as much water out as I can, and try to keep the first stage above the second stages, and as soon as I get home I put the reg under pressure again before soaking. Still I end up having to have the reg serviced about once a year based on monitoring the IP for creep. Even trying to avoid water in the reg, the parts still get a fair amount of corrosion. Enough that I'm thinking about getting another reg set without the seat-saver feature.
I have been using Atomic regulators since late 90's for my personal diving and in my dive school without the issues you describe. I NEVER had the issue with IP pressure creep with Atomic at all since the late 90's. I can go on 3 - 5 years between servicing without issue and the regulators still perform like new.
The myth that water will find its way through the second stage to the first stage because of the "seat saving" feature is just that, a myth. If you really have issues with IP creep that frequently, you have other issues with the regulator nothing to do with what you think it is. The seat saving feature is one of the features that make the Atomic regulators super reliable.