It would be great to have the ability to edit a block reservation after the invoice has been paid without having to delete the invoice. For example, when someone wants to cancel one day of their block reservation or remove a service I don't have a good, clean way to reflect that. My current workaround is to "refund" the reservation as a credit to the account, delete the invoice, rebuild the reservation block, and then "pay" with the credit. The ability to edit the reservation without all the extra steps would be extremely helpful.