Can't get piston tutorial working

Hey thanks for the help, but im quite new to maya and still learning...

I cant get the last step right...

I have uploaded my file, maybe if you have some spare time you could look at it and fix the final step? Because i have tried every rotation / translation and nothing seems to work.

And it seems like this is the online tutorial i can find with this specific subject

Thanks in advance! hj

Here you can find my file, almost completed...