Yeah, I had recently emailed Bob about them and other options. The crossover is a tough part if I go 2 way as I don't have the tools to design all of that. Bob could do crossovers if I go Fatial drivers and horns, though. Had seen Dave's, too, but it puts tweeter on sides instead of same plane. Might not be bad but...
Using a quote from John Candy, "I'd have a better chance of finding a 3 legged ballerina than I would finding a set of K-500 horns". Lol