Hi Jimmy, the answer is. . . I do not know the answer! I have developed an equipment tracking spreadsheet that I have already used for a few components. . . I just entered the required break in hours and the start date. Each day I play music I enter start time. . . then when music stops I enter termination time. The spreadsheet then calculates the current breakin percentage, total hrs, and projects when the break in may be complete. Send me an email, and I'll send you the template. Guido