[polytechnique]

Our team has been able to reliably and successfully climb (6/8 times hanged in the LED qualifier in Marietta, Georgia) using a screw-drive arm system. We drive to the mid-zone, reach for the highest mountain bar, and pull ourselves onto the high mountain. As it turns out, the largest-diameter Lynxmotion sprockets allow you to catch yourself between the highest bar of the midzone and the lowest bar of the highzone, keeping your robot locked in if you have a low enough CoG.

You don't need to drive up the mountain, you can pull yourself up just as easily. I saw a lot of teams with a tape-measure system that was very flimsy, despite being compact and cool.