How to implement BTCZ on my z-nomp pool?

If I change this code:

var amount = satoshisToCoins(zBalance - 10000); // why is it changed?
// unshield no more than 100 ZEC at a time
if (amount > 20000.0)
amount = 20000.0;

would it be enough?

In configuration file for zcash there is "txfee": 0.0004. Should I set it to "txfee": 0.4?