taking a tip from @MikeVV, I swapped out my Ghost huma reg gauge for a larger Wika reg gauge. Besides being a little easier to read, it seems to report a lower reg pressure for targeted fps than the OEM Huma gauge.
example - with the wika showing 65 bar on reg, I am averaging 911fps on 15.9 Hades. Before, the Huma would be at 75bar for similar fps.
. For JSB MRD 25.9, it is 120 @931fps for wika but OEM Huma was at 130 for 925fps
I reused the OEM Douty seal and no leaks thus far. All in all, happy with the wika gauge but not decided if I will change out the tank gauge yet.
example - with the wika showing 65 bar on reg, I am averaging 911fps on 15.9 Hades. Before, the Huma would be at 75bar for similar fps.

I reused the OEM Douty seal and no leaks thus far. All in all, happy with the wika gauge but not decided if I will change out the tank gauge yet.