function getPreRemainCoins() onlyOwner public {
        uint preRemains = PRE_MAX_CAP - preCoinSentToEther;
        Backer storage backer = preBackers[owner];
        coin.transfer(owner, preRemains); 
        backer.coinSent = backer.coinSent.add(preRemains);
        preCoinSentToEther = preCoinSentToEther.add(preRemains);
        
        LogCoinsEmited(this ,preRemains);
        LogReceivedETH(owner, preEtherReceived); 
    }