[ajmargarine]

There's a reason you use the 4xBB+1bb per limper in these situations. You want to give the first caller less than 2:1 pot odds to call you, 2nd caller less than 3:1 etc.

As played, first caller calls $2.50 into a $5.75 pot, giving him better than 2:1 to call. If you use the guide here, first caller would be calling $3.50 into a $6.75 pot, worse than 2:1 odds.