Interesting about the Yellow Jacket just being OK. I had read some good things about it so maybe it's one of those cases where people look back more fondly on something than their actual experiences. or maybe it is just the cool name, yellow paint, and there just doesn't seem to be that many around.I had one decades ago. It was a NOS pedal. It was just OK. The first year yellow painted pedal is more rare!
The best vintage pedal I currently have is a modified Slingerland Tempo King. It uses the bearing and "S" hook from a Yellow Jacket. It's a very light and fast pedal!