I am using a pair of Spin 33 ECSs in my new twin. I am testing the electronics and curious about what I consider strange. I am using a single battery to power both ECSs using a "Y" harness from the battery. Both ESC on/off switches are connected to the same DPST slider switch. When the BEC switch is thrown, both ESCs "arm" but not in unison. There is about a 1/2 second between #1 and #2. The timer functions normally and the motors start in unison. I suspect this is weird and I would like to know if it is normal, and I should not worry about it.
Ken