(btw...love the Deadwood reference in your name! :-)
Well....I guess that's what I get for dribbling out only a subset of our ULC considerations. You got me!
Technically, yes, the SP600 could work with the ULC concept. The issue with including the SP600 in the ULC lineup is a result of the "generalized" nature of the ULC cone which fits a number of pots. Pots that were similar enough in diameter, height, and handle location could use a single cone. This is possible because the pot wasn't hanging by its lip, so we could have a looser fit on the diameter. Also, by generalizing the cone, reducing the material usage, eliminating the fuel bottle, and eliminating of the Caddy we could achieve a lower price point and thereby come up with an entry level product.
The SP600 however is unique enough in diameter (smaller than the 700), height (shorter than the Mini Solo, EV640 and MLD850), and handle location (it is lower and hits the tops of the cones), that we would have to make a unique cone just for it (impacting our low cost/Henry Ford everyman cone idea...."You can have any color car you want just so long as it's black").
Now, with that said, what we didn't consider is, offering it as a Ti-Tri ULC where the material cost is the driving factor in price and we pretty much make each Ti-Tri custom any way.....hummmm......interested in a titanium ULC for your SP600?