pb,
You do understand the only reason to have an egg-timer is when you have something that you manually want to turn off and let run for s specific amount of time and shut off..
If you have a schedule that runs for 5 hours.. it has a start time and an off time, so you do not also have to add an egg-timer for 5 hours.
Most circuits do not need an egg-timer at all.
Thanks,
Jim R.