Johnny's biggest obstacle was the loss of his right hand due to an industrial accident. This had a profound impact on his life, both physically and psychologically and became the driving force behind his desire to build mechanical hands. Losing a dominant hand is especially challenging for guitar players as it impairs their ability to grip the instrument properly and make intricate movements. Despite this setback, Johnny remained resilient and used his knowledge of engineering and music to create innovative solutions that allowed him to continue playing his guitar.