Nick,
I love the steamy pictures and video. Admittedly I had to mute it, that pitch hurts my ears unfortunately. But the turbine is purrty.
What do you heat your house with? Wood? Those old chimneys require a lot of draft which wastes heat. (They actually knew that in 1924, I bought a reprint of an old steam engine textbook. Very interesting.)
I run my engines in the cold as well. I find that I need to richen the alcohol (more towards 95% than 75%) but I don't have problems with icing.
I have issues with traction:
Admittedly, today was around 10F so not as cold...