RE: smoke system
I've used "SuperDri" and I've used the home-brew of kerosene + corvis oil. about the same smoke... but the SuperDri cleans up much easier, and doesn't stink.
I haven't seen the Ultrasmoke....
I have heard of ALL KINDS of homebrew smoke oils.. the only real requirement is the mix not ignite in te muffler. (that would be really BAD![X(])