Andre it hurts like hell but I've felt worse pain! But it was only a small part. And being of Mediterranean backgrounds and BBC we both could expect to have shadow but it seems you have found a real good way to cover yours up. Your shadow is almost non existant bro.
Even after a fresh headshave and application of almond oil,even my intense shine cant get rid of it.
I always complain about it to my wife and she says "Of course! You have shadow because you are not supposed to be bald!" and then I say "I love you honey"
We have that kind of marriage.