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Re: 4 vs 6 wheels
our robot uses 4 large (like, very large) wheels with not tons of traction (I'd say a bit less than the KoP grippy wheels), and we use the long-wheelbase configuration. We've had trouble getting the robot to turn at all, however most of this is, we believe, due to our loose chain tensioners which defeated their purpose by skipping whenever the drivetrain was under stress. haha.
Anyways, my point is to not underestimate any given issue you might have. You could say "meh, it may not work well but at least it'll work" when designing and find out it doesn't work at all.
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"No Mythical Creatures in My Classroom!"
-Myself
Yes, my dislike of twilight sparked the inside joke that created our team name. I feel special.
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