[Maico]

Yes, I hope you are using the programing software on your stick. You dont have to use F12. You can use what you like.

1.Open TIR software

2.Change centering to whatever you like.

3.CLOSE TIR.

4.Got to your stick programing software and assign that button (F12, G whatever)

5.Reopen TIR. Move head, press button, TIR should center.

If you skip step 3, you will not be able to assign the button you picked to center TIR.
Remember this. If you have TIR open, you will not be able to use that button for anything else. Keep this in mind.

Hope this is not confusing.
Good Luck.