Anyone that has used this timer before for airstart operations, you should be able to answer this.
To program it, you hold the switch down the number of seconds you desire. A tenth of a second is pretty quick, and that goes in .1 second intervals. If you come up, say, .4 second too short, the secondary motor would light while (probably) the first motor was still firing.
Another question: How do you attach the igniter? The timer has solder pads, but I can't imagine soldeirng igniters to a timer... Do you solder wires with microclips or somthing, or maybe buy a screwdown terminal and add that on?