Speaking from personal experience, working for a long period of time as a back shaper can cause a lack of creativity. Making the same models over and over can lead to a hiatus in the gathering of ideas, which you come to little by little, without realizing it. 

But the day always comes when inspiration hits you. When creativity «explodes» and you start working on new things. New unusual strings, the improvement or modernization of some models, the creation of new shapes, and, less fascinating but no less important work, the refinement of your workshop. 

But where does creativity come from? Monotony and repetition? The conversations with different surfers and friends? The feedback you get from testing in the shape room and in the ocean? For me, creativity comes from all these things together and, as I always say, the love for this work and the desire to keep improving. This is my inspiration.