Mike,
I'm thinking that if the bag is a tight sqeeze with that stuff, that you can use the alosak 5"x4" bag. I'm not sure the dimensions of the currest dr/amk psk, but i'm thinking its a bit smaller then the 5"x4" alosak. Then you would have a truly waterproof bag, that can take a beating, and fit the additional stuff.
Kris
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"One should not increase, beyond what is necessary, the number of entities required to explain anything"
William of Ockham (1285-1349)