Using the LookAt Constraint

[Starbuckminsterfullerton]

So I'm planning to use the lookat FX constraint to keep a piston/cylinder pair lined up, which I think might be the most common application. I mostly know what to do .cfg wise, but I need some Unity guidance...

What point will Unity use as the pivot for the rotator?

Which end of the object will point at the target?

Is there anything else I need to setup under the hood in Unity to make this possible?

Thanks for all the help you guys have given me so far, I promise I'll have a mod to show for it soon.

[lo-fi]

1) the local pivot of the named GO it's applied to

2) Z+

3) it will rotate around the X axis. Put them facing each other, correctly aligned to start with. I've seen people align them to world Z, or something equally bizarre..

youtube runs through it toward the end if you need any further guidance.