Funny story…
I got the Cessna 150 on Christmas when I was 9-10 years old. Assembling the model, I got confused by the illustration of the instructions on how to connect the fuel line. I ended connecting the fuel line from the back of the backplate, at the hole with the mesh, to the fuel tank, lol.
Cox updated the illustration in the later Cessna models. I presume others got confused as well. Pictures of both illustrations attached.