Interesting spindle. I wonder what the original use is.
I seem to look at the UCA angle now, after all these discussions and doing my suspension layouts, and when I see UCA's that slope down to the tire it makes me think it won't have good geometry. At the very least, an UCA located like that probably has a junk camber curve since it will go positive for at least a bit before it starts going negative. It was one of the things Joe talked about in regards to using a taller UBJ with his HDK kit. This assumes a flat LCA, too. Not really sure what the camber curve would look like if the LCA were sloped the same way, but my guess would be it wouldn't make any difference since the LCA is much longer and the LBJ wouldn't move out as far as the UBJ resulting in the same bad camber curve.
Doesn't mean the suspension is shown at ride height though. So I am not saying they don't have good geometry, just an observation.
Heidts doesn't make any mention of geometry or handling either.
Based on the above, my gut says it the only competition that kit would be good for is drag racing or on the grass. Probably cruises fine, good for rolling around the fairgrounds or the highway, but I get it doesn't like roundabouts and wouldn't do well on an autox course. Just a guess though.
To be clear, these are only my opinions. Don't want anyone to think I am making statements of fact.