Sheesh, it aint rocket science, its amazing how complicated some people can make it. Just do what Steve there sez, get an el cheapo timer and wing it. I use a stopwatch that I stole from my psychotic high school football coach after he tackled me and a friend from behind in the hallway because we were making fun of him.

Ooops, guess that cats out of the bag 23 years later. But its taken a lickin and keeps on tickin.