I have an older 2001 MK2 with a G200B (which is nothing but a G250 without the tuning knob) and an R190 on a bungeed necklace. I would use this reg anywhere for anything. I always soak my regs still hooked up to a tank and pressurized. I have a big galvanized watering trough I use to soak gear.
After soaking I hold the hose up to the ambient holes and force fresh water through the reg holes.
I also have a theory for using open piston regs in dirty silty water: Don't depressurize the reg right after a beach dive and let it dry depressurized, because the piston will retract and the grit will dry where it wouldn't normally be able to get to if you would have kelp the reg under pressure.
During normal breathing the piston doesn't really move that far for grit to get in between the O-ring and the cap body.
There is always a lot of chatter about the evils if open style piston regs, and how sealed diaphragms are so far superior. I disagree.
I don't like the cone shape or the engineering aspect of most of the diaphragm HP seats. They are a flawed design and I have not only seen but heard about several that have grenaded and caused sudden extreme high pressure blow outs.
There is no way a piston HP seat can do that.
Not only that, just the simplicity and fail proof design of piston regs make them the absolute most reliable.
I have torn down many Scubapro piston regs that are very old and very crusty. In every case I have been able to restore them back to perfect working order. I have a friend who works at a very large dive center in the Los Angeles area. They regularly get dozen of sets of MK 25's from the university and from military and law enforcement. None of these regs are well taken care of, but after a cleaning and full service they are back to working like champs, year after year. Scubapro is made for it and the quality of their materials and manufacturing speaks for itself.
If piston regs were that bad the the MK 25 wouldn't still be their flagship regulator, they would have abandoned the piston idea years ago, don't you think? But they haven't.
Piston regs are still and always will be the best and most reliable regs in the world and nothing will ever beat them.