Trim Fuel isn't working for me, I click it and it does nothing. Had a couple players test it as well and doesn't appear to do anything for them either. I'm going to assume that Trim Fuel allows the WOOD fuel source to be trimmed a bit, or is it not supposed to do anything by design?
I ask because I notice that when its pulling the wood, its almost pulling twice as much than what's actually needed... be nice to trim it down by a configurable %, or have it increment a trim in set amounts each time its pressed.