Active headrest re-set?

[Filius]

I recently bought a 2010 2.5S and I love it, except the driving position is not ideal for me. I have made a couple of mods to address that -- putting spacers under the front seat brackets to lean the seat back a bit more, and inserting some extra foam in the lumbar area, both of which have helped.

My problem is that after putting in the extra foam, I noticed that my headrest has moved forward so that it touches the back of my head occasionally, whereas before it never did. I'm thinking that when I put in the extra foam and sat in the seat, it pushed back on the mechanism that activates the active headrest system. I can't move the headrest back to the angle it was at before. I assume the active headrest system needs to be re-set somehow.

Does anyone have any idea how to do that?

Thanks!