I posted it cos I hadn´t a good feeling about it.
I still think pre is ok to open. The shortstack is in push-fold mode so when I open he has to have a good hand.
Of course I wasn´t happy to get a 3bet and folding is better then calling because my stack is too small. I think I have to have at least 50bb to call.
On the flop I just decided to gamble on a not so dangerous board but as said open jam is probably better.
As a side note the outcome was
everyone folded to my jam