Regarding the problem of the gas tank getting cold and losing pressure...I wonder if a person could route the exhaust steam through a pipe wrapped around the gas tank a few times and extract some of the otherwise lost heat and put it to use? Like a heating tape wrapped around a water pipe?
Certainly, it's been done!

Logged
"Information is not knowledge, Knowledge is not wisdom, Wisdom is not truth, Truth is not beauty, Beauty is not love, Love is not music: Music is THE BEST...
Wisdom is the domain of the Wis (which is extinct). Beauty is a French phonetic corruption of a short cloth neck ornament currently in resurgence..."
F. Zappa ... by way of Mary, the girl from the bus.