By this time, Zuckermann had become frustrated by the amount of time he spent on service calls, and conceived the idea that if his customers were to build their instruments themselves from a kit, they would then be self-sufficient with regard to maintenance.
By this time, Zuckermann had become frustrated by the amount of time he spent on service calls, and because concerned that maintenance would soon consume all of his available time. He conceived the idea that if his customers were to build their instruments themselves from a kit, they would then be self-sufficient with regard to maintenance.