so, yes each cap is 45 degrees apart. BUT that is 90 degrees movment at the crank.

it is programmed in. you have to dial it in based on the timing you see vs what the computer says it should be and change an indexing setting to allow it to know where it is.
the instructions basically said to use the crank degrees to see where it was placed.
it does matter where number one is pointed in relation to the vanes.

it hits a vane first then fires. the computer then has time to know when to fire. vs a vane hits and that is where number 1 is on the rotor.

the distance between the sensor and rotor is variable. since that is what it is based on for firing.