Finding direction for vector thruster

[sukasa]

I'm trying to build an Amraam-based missile that can take a GPS co-ordinate, and fly itself to that position using a vector thruster. I've got the basic missile set up; It has a normal wire thruster on the back, and a vector thruster up front for steering. I've got one GPS in the back and one up front. Now, what I would like is a little help figuring out how to set up an expression gate or whatever to take the current missile position/direction and have it be used in conjunction with the GPS co-ordinates given from a data transferrer in back to steer the misisle using the vector thruster.

So far, the operation of the missile is planned like this:

Data transferrer (over B/C/D outputs) gives the missile the co-ordinates it's supposed to attack
Transferrer then sends 1 over A, which activates the rear thruster.
3 seconds later (giving the missile time to leave the launch tube), the vector steering is to kick in.

I have everything except the steering system, can anyone please help me?

[-Gamah]

have the incoming X go to X value of vector, Y goes to Y and Z goes to Z, pretty simple. thruster should automatically accelerate towards those coords.

[sukasa]

That didn't work, but I did manage to get a target finder and beacon sensor onto the Amraam without it being unsightly, however, it steers really weirdly. Can I ask for any help with it (attached below)

It's wired almost as shown in the picture below, but I didn't bother to add in the If-Then-Else chips that simply acted as multipliers to get the thrusts I wanted >_>

By weird steering I mean it steers anywhere BUT towards the locator target no matter what thrust I set the vector thruster to, positive or negative. Anyways, to fire it, just send 1 along (A) in the data transferrer hanging off the back. you may want to fiddle with the constant value chip, It's on the side of the amraam, farthest forward. Up is when the target finder's extrusion is facing up.

[Pyro-Fire]

use vectors.