Quote:
Originally Posted by cjl2625
In what ways do the metal defenses behave differently?
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As mentioned in the post above: friction.
Our method for climbing over the obstacles relies on enough friction to push the wheels into the obstacles (like rock wall, for instance) with enough force to create enough friction to allow the wheels to climb up and over the obstacle. On the wood version - this works perfectly. On the plastic/metal version - not so good.