per your request adjusted. Tried to think of something else to put in the back of truck to indicate problem solving but the brainstorm didn't work well for that one. Let me know if you want to see other modifications.
I liked the changes. What about a a compact florescent light bulb in back. I believe that it would show the concept of a new idea as well as being "cutting edge"
per your request a florescent light bulb - ideas are one element of the problem solving equation and the classic light bulb symbolizes ideas - NOTE - I was an Odyssey of the Mind coach for kids in the past - "creative problem solving" so I am trying to pull from that symbols of the different techniques - brianstorming, trial and simulation etc...