[EricH]

Originally Posted by Katie_UPS

I was referring to Al's statement about chaining the steering of all the wheels together. Unless you're saying they don't power one half and do a skid-ish turn of some sort, which is something I've never heard of. Could you please elaborate?

Exactly what I'm talking about. You can use a 2-and-2 power arrangement to simulate a skid-steer. You'd only do it as one mode of driving; normal operation would be to drive like a swerve. But for a quick reorientation, a skid motion can help. (Turrets are also an option, but that's another dose of mechanical complexity.)