@homeboy4   This is exactly what I'm looking to do as well.  I'm all about saving time and for a new customer who needs an estimate with a similar job request as a different customer that we went direct to an invoice (and therefore didn't have an estimate), I would prefer to "make a copy", but as an estimate (vs. invoice) for the new customer.  Or in another instance, for the same customer in a prior year we went direct to invoice, but this year new management wants to see an estimate first...I hate the idea of re-typing the entire thing when a simple "create estimate from prior invoice" would be a great option!  

QB - please add!