I will take number 18 for mine!
These units drool heavy duty, and scream for some honest work to do..
Just the polar opposite of a Snow Trac, and perhaps more rugged than a Tucker, although in deep snow I doubt they would perform as well as either. It would be interesting to know the PSI on the snow for each of the configurations of these machines listed. My bet is that are a bit on the heavy side..
I think a certain member here could clarify the specs on these if he happens to see this post..
Regards, Kirk