I would like to modify the amount for any given occurrence of a recurring transaction without impacting the actual recurring transaction details so that I can better forecast cashflow for a given month.

Example 1: Utility bills.

I set an "average" for my power bill but once my bill is actually received I would like to be able to input what it will actually be as I often know that information many weeks ahead of when the funds actually pull from my account.

Example 2: Credit card payments

Similar to utility bill example. If I pay off the entire balance of my credit card on a monthly basis, I would like to be able to set the recurring transaction for that month to the known dollar amount.