Not the way I would do it, but that does not make it wrong. I like things, especially wiring, very simple. That said, I would wire my relays, with 12v to post 30 and out to the solenoids from post 87. This makes the relays hot all the time, with clean power. You wire the ARM switch, to put power to the WOT switch. The WOT switch, then triggers post 85 on relay 1 and can also trigger the timer, that turns on relay 2. The timing retards can either tie into the outputs from the relays, post 87, or can tie into the trigger, which is post 85. Ground post 86 on the relays. You can also tie the "hot" to the purge button, onto the arm switch. This way, if the purge won't work, you know you are not armed. I personally never use hobbs switches, never seen the purpose of one, plus they tend to cause problems with surging systems.

Monte