Feature request – backorder handling time

Hi, I would like to request a feature to add some handling time for backordered items. I.e. the plugin should check if there are backordered items in the cart and if there are some it should add some time to estimated delivery date. The amount of time to add should be specified in the backend.
This way shops selling both in stock and backordered products would be able to use “Display Estimated Delivery Date” feature.
Adding handling time (separate value from above mentioned) for non-backordered products would benefitial as well because currently we have to add handling time to each delivery method time.

P.S. Thanks a lot for the plugin – it is both lightweight and functional which is rare to find