Been reading the SRW vs DRW threads... I have never towed with a DRW and I'm curious what everyone means by "stability". Can you describe what you're experiencing that feels more stable. To say ...
I didn't read the whole thread, but I doubt the number of tires has much to do with it. It's probably the track (distance between outside tires) that makes the difference.
You see more OTR's these days with single (wide) wheels. Must make sense to them...