Maybe I am far too tight, but Im not raising (probably folding) with QKo in EP even with only 4 opponents.

However now im involved I think - SB bets pretty weakly. However im often get really wary of EP callers PF that come out betting post flop - especially at these levels, its weak, but not the minimum and in the players eyes might be a "big" bet. Having said that, with the amount of chips he has left I raise it to about the pot, like you. I get two callers.

To me two callers indicates my hand is no good - I wouldnt bet into the side pot and would just check it down.