Oooh, I thought of something else! I have a hard time hearing some of the watches I have used for starts (probably because of all the yelling). Because of this at one time I purchased a cheap watch that was specifically designed for the hearing impared. It vibrated like your cell phone in time to the countdown sequence. That watch was great but not built well enough to last through the rough treatment. Maybe a vibration feature along with the audible signals?

Always borrow money from a pessimist. He won't expect it back.