[dardo]

As fas I have seen you usually can replenish whenever you want up to maxium buy-in.

Also, as I've seen good players always have the maxium buy-in, I guess they trust their ability to prevent being stacked and to stack "deeply" other players when they can.

So, as a general rule I would have larger stack if you feel confident, and smaller if you are not sure or feel outplayed.

regards,

dardo