One solution that I have heard of, not seen nor tried, is to use the Nomad with 8 lbs weight on the back and 12 lbs on the belt and using 12 litre 232 bar steel tanks. Don't know if it really works.
Maybe some of the insulation could be replaced with an electrical heating vest and double hood?
I have the same excact problem: how to become negative.
Maybe some of the insulation could be replaced with an electrical heating vest and double hood?
I have the same excact problem: how to become negative.