I never really saw a reason for this. It would only help and moni get up stairs or a ramp if you hit it prefectly cause otherwise the tracks would lift and you would have a point contact anyway.
I also didn't see the traction advantage since well... You guys seem to have that one covered. I could see it if you were rolling across a very soft sureface like pluch carpet cause there would be more rollers to grab the carpet but still seems like a lot of work for not much gain.
After three years of doing omnis I will safely tell you that they DON'T go up ramps, stairs, or any major feature in the ground. Minor ones are easy enough to roll over but if its more than half the heght of your roller then you have a problem. I also have found that you won't be pushing your opponents around the field, this does not mean that you can't play defense but you won't win a pushing war, or macht, or even scuffle
.
However, I can see why you would want to do them from a cool standpoint. When people first started talking about these a year ago I got into it and modeled an omni track and went a little overboard and also did a mecanum track (My comp
hated me for that one). Sadly however my old comp died and I lost the models.