There are many cases in the Animal Allies where we need the color sensors. So we have to come up with a solution to deal with the gate. I also viewed your suggestion for #1 and #2 robot design and I believe all those robots have color sensors. Especially #2, where most of the robots have their color sensors mounted on the front of the robot. Perhaps I'm not understanding when you said, "advice on not having the color sensor pass over the gate", Please clarify.