The rotating light is right where I like it ... on top of our tower in the pit. Those things were heavy. For most teams they either broke or were hidden (do you know how many visiblity arguements I had as an inspector?). Spare Parts ran out of covers, while we were up to our knees in shards. Teams routinely forgot to change their cover color. Does anyone remember how difficult it was to isolate the grounding on the light from your chassis?
I like the Bike flags. They are light weight, cheap and highly visible (above the bot). Queuing hands out the right color flags to the teams so there is no confusion. The rules regarding them are easy to follow and even if a team forgets their holder (many have) they can make one in 15min. Plus it is a real crowd pleaser when a big hit sends a flag flying (one went into the stands at Philly
).