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That's a great idea.
Uufortunately I use one of those OMS 10 foot mothers that will not fit in even the huge OMS zip pouch. I wonder if the Razor pouch is 'bigger' enough.
Maybe my whole problem is the size of my DSMB more than anything else, though it has lived in the butt of my Transpac without the buttplate, and my home-made SM rig for years, and I only even started having to futz with it after adding the butt plate to the Transpac, and I rally only notice it when diving BM with it.