Dave that's a really nice looking K&B! Looks like the older style carb, too (w/o fins).

I see someone already beat me to the .35 history factoid, so here's another: Fred Dunn designed an Astro Bipe the year later in '59. I don't think it was ever published as a construction article, but John Pond had some plans that are now available through the AMA Plans Service. The problem is, one set is $59 and the other is $80! Both include parts patterns, but I'd like to know what the differences between the two sets are.