Reply to Mapping help

I try to perfect my beat gridding mapping for maschine. I really like what Ean did in his Prep Tool with the Master Tempo, so every song plays in its native speed. Can anybody please explain me how to do that?

I spent hours without getting it to work.

Here's what I have so far (everything mapped to one button):
1. Set Deck as Master
2. Set Auto Master
3. Sync Deck
4. Play / Pause

What am I doing wrong?

Thank you in advance!