Okay here is my experiment. The main issue with any stove systemss weight is fuel. With that in mind I was going to experiment as follows. A firebox nano and my primary fuel would be biofuel. When biofuel proves problematic I was also going to have my Esbit (trangia clone) alcohol stove and a few ounces of fuel, 5 or 6 max as back up. This is basically a 2 person 5 day set up. Now my question is this. I know in winter alcohol has issues lighting. There are two ways around this. Keep your main fuel bottle close to your body so it's all warm or keep a small bottle, like a contact lens drop bottle, in a pocket and use that to prime the stove. Does any one have experience with both methods who can tell me the pros and cons of each?