WOW joe, that is some of the neatest picture I have seen in a long time! I would pay to even see a wallis cub jr set up like that one! by the looks of it that was some sort of factory built prototype or (something?) doesn't look like a homebuild job. and I wish I could buy a few of those wallis paint cans. did malcolm ever tell you any sort of date on that advertisement?
I really want to figure out what those wheels at beiwers are off, they used the same hubs and looks like there is about 1/2" to 3/4" taken off each side of the rim and the spokes all seem to be in the same locations.
here is another picture I found on the net but since then like many times i have forgotten where it came from so they don't get credit. from what I found when I found it it is number 14116, and was pictured in the december 1990 issue of gas engine magazine. the number 14116 is probably the block number on it because according to the k-3 parts list it would be a k-3 if it were the serial number. so as you can see by the picture it is a kerosine fueled "K". so if anybody know where this one is at or happens to have a december 1990 isuue laying around I would very much like to learn more about this one.