The other peice of plywood has 2 purpses it would give a little bit more to screw into but more importatntly it was to strenthen the one that was there now i dont know if there all like that but it was week it seemed like it was pressure fit without any glue

the blue fuel line clip that you see in the pics is actully ment for rc trucks apparently alot of them have a problem with the engine flooding when not in use (could be wrong .....)