More on Samuelsson's Questions About What σταυρός Meant in Christianity

I think if we are going to probe into what σταυρός originally meant the place to start is here:

ω ανοητοι γαλαται τις υμας εβασκανεν τη αληθεια μη πειθεσθαι οις κατ οφθαλμους ιησους χριστος προεγραφη εν υμιν εσταυρωμενος (Gal 3:1)

which is translated in a number of different ways:

O foolish Galatians, who hath bewitched you, that ye should not obey the truth, before whose eyes Jesus Christ hath been evidently set forth, crucified among you? (KJV)

Foolish Galatians, who has bewitched you not to obey the truth, before whose eyes Jesus Christ was openly set forth among you as crucified? (World English)

The part that has always puzzled me is the idea of being crucified 'among you' εν υμιν εσταυρωμενος. To me it sounds like an extension of the "From now on let no one trouble me, for I bear in my body the marks of the Lord Jesus" (Gal 6:17) concept. In other words, I imagine that the Apostle was really arguing that the proof of the εσταυρωμενος is manifest his own person (i.e. that whatever σταυρός meant it was displayed in the person of the Apostle!) 

In other words, the Apostle was walking around with signs on his body that there was a εσταυρωμενος. 

I know this sounds crazy but I have always thought that John 20:19 has a bizarre scenario where the disciples are hanging out with a guy that they don't know really is Jesus but this is confirmed when he"showed them his hands and side. The disciples were overjoyed when they saw the Lord." 

I still don't know what σταυρός means but neither do any of the experts it seems.